Task: I want a nap of 10 min , snooze the 09:25 Alarm for the same in the clock app
Steps:
Click on the Alarm section 
Click on the + icon
set hour to 9
set minutes to 25
Click on the ok button 
Click on the Add label  tab 
Enter a name as nap
Click on the ok button
Click on the snooze tab
Click on the snooze tab