[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Ticklefish:
I had a look into this and I have come up with a solution...more or less.

We need to put the clock inside a LinearLayout of fixed width. That Layout will be centered in your statusbar and the clock will be fixed to the left side.

So we'll change your code to this:

<?xml version="1.0" encoding="utf-8"?>
<com.android.systemui.statusbar.phone.PhoneStatusBarView android:orientation="vertical" android:id="@id/status_bar" android:background="#ff000000" android:focusable="true" android:fitsSystemWindows="true" android:descendantFocusability="afterDescendants"
xmlns:android="link here, cant post it here"
xmlns:systemui="link here< cant post it here">
<ImageView android:id="@id/notification_lights_out" android:paddingBottom="2.0dip" android:visibility="gone" android:layout_width="@dimen/status_bar_icon_size" android:layout_height="fill_parent" android:src="@drawable/ic_sysbar_lights_out_dot_small" android:scaleType="center" android:paddingStart="6.0dip" />
<com.sonymobile.systemui.statusbar.operator.OperatorLabel android:textAppearance="@style/TextAppearance.StatusBar.Clock" android:ellipsize="marquee" android:gravity="start|center" android:id="@id/operator" android:visibility="gone" android:layout_width="wrap_content" android:layout_height="fill_parent" android:singleLine="true" android:paddingStart="6.0dip" android:paddingEnd="4.0dip" />
<LinearLayout android:orientation="horizontal" android:id="@id/status_bar_contents" android:layout_width="fill_parent" android:layout_height="fill_parent" android:paddingStart="6.0dip" android:paddingEnd="6.0dip">
<LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1.0">
<com.android.systemui.statusbar.StatusBarIconView android:id="@id/moreIcon" android:visibility="gone" android:layout_width="@dimen/status_bar_icon_size" android:layout_height="fill_parent" android:src="@drawable/stat_notify_more" />
<com.android.systemui.statusbar.phone.IconPartitioner android:id="@id/notification_icon_area" android:layout_width="0.0dip" android:layout_height="fill_parent" android:layout_weight="1.0">
<com.android.systemui.statusbar.phone.IconMerger android:gravity="center_vertical" android:orientation="horizontal" android:id="@id/notificationIcons" android:layout_width="wrap_content" android:layout_height="fill_parent" />
<LinearLayout android:orientation="horizontal" android:id="@id/system_icon_area" android:layout_width="wrap_content" android:layout_height="fill_parent" />
</com.android.systemui.statusbar.phone.IconPartitioner>
</LinearLayout>
[COLOR=black]<LinearLayout android:layout_width="54.0dip" android:layout_width="fill_parent" >[/COLOR]
<DigitalClock android:textAppearance="@style/TextAppearance.StatusBar.Clock" android:gravity="start|center" android:id="@id/clock" android:layout_width="wrap_content" android:layout_height="fill_parent" android:singleLine="true" android:paddingStart="6.0dip" />
</LinearLayout>
<RelativeLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1.0">
<LinearLayout android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_alignParentRight="true">
<LinearLayout android:gravity="center_vertical" android:orientation="horizontal" android:id="@id/statusIcons" android:layout_width="wrap_content" android:layout_height="fill_parent" />
<LinearLayout android:gravity="center" android:orientation="horizontal" android:id="@id/signal_battery_cluster" android:layout_width="wrap_content" android:layout_height="fill_parent" android:paddingStart="2.0dip">
<include android:id="@id/signal_cluster" android:layout_width="wrap_content" android:layout_height="wrap_content" layout="@layout/signal_cluster_view" />
<TextView android:layout_gravity="start|center" android:id="@id/battery_text" android:visibility="gone" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/status_bar_settings_settings_button" android:singleLine="true" android:paddingStart="4.0dip" style="@style/SystemBarNotificationText" />
<ImageView android:id="@id/battery" android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingStart="4.0dip" />
</LinearLayout>
</LinearLayout>
</RelativeLayout>
</LinearLayout>
<LinearLayout android:orientation="horizontal" android:id="@id/ticker" android:animationCache="false" android:layout_width="fill_parent" android:layout_height="fill_parent" android:paddingStart="6.0dip">
<ImageSwitcher android:id="@id/tickerIcon" android:layout_width="@dimen/status_bar_icon_size" android:layout_height="@dimen/status_bar_icon_size" android:layout_marginEnd="4.0dip">
<com.android.systemui.statusbar.AnimatedImageView android:layout_width="@dimen/status_bar_icon_size" android:layout_height="@dimen/status_bar_icon_size" android:scaleType="center" />
<com.android.systemui.statusbar.AnimatedImageView android:layout_width="@dimen/status_bar_icon_size" android:layout_height="@dimen/status_bar_icon_size" android:scaleType="center" />
</ImageSwitcher>
<com.android.systemui.statusbar.phone.TickerView android:id="@id/tickerText" android:paddingTop="2.0dip" android:layout_width="0.0dip" android:layout_height="wrap_content" android:layout_weight="1.0" android:paddingEnd="10.0dip">
<TextView android:textAppearance="@style/TextAppearance.StatusBar.PhoneTicker" android:layout_width="fill_parent" android:layout_height="wrap_content" android:singleLine="true" android:textAlignment="viewStart" />
<TextView android:textAppearance="@style/TextAppearance.StatusBar.PhoneTicker" android:layout_width="fill_parent" android:layout_height="wrap_content" android:singleLine="true" android:textAlignment="viewStart" />
</com.android.systemui.statusbar.phone.TickerView>
</LinearLayout>
</com.android.systemui.statusbar.phone.PhoneStatusBarView>

However, you will need to change the value of the LinearLayout's width to make sure it's as wide as the maximum width of your clock. The easiest way to test this is to make the Layout look like this:

[COLOR=black]<LinearLayout android:background="#ffff0000" android:layout_width="54.0dip" android:layout_width="fill_parent" >[/COLOR]
<DigitalClock android:textAppearance="@style/TextAppearance.StatusBar.Clock" android:gravity="start|center" android:id="@id/clock" android:layout_width="wrap_content" android:layout_height="fill_parent" android:singleLine="true" android:paddingStart="6.0dip" />
</LinearLayout>

You don't have to use that colour, that's up to you.

Once you've got the size of the Layout right, this will keep the left of the clock in the same place..BUT it will still continue to change width with almost every second. That's caused by the font you're using for the clock so can only be fixed by using a different.

Oh, and the clock will look a little off-centre between midnight and ten am as it doesn't have a leading zero. In other words, you get a time like 9:24:15, not 09:24:15.

So this will work...but it might not have the effect you're after.