### Clue: Letter for Member of Parliament's solicitor (4)
### Answer: PIMP 
 ### Explanation: Definition: solicitor
  PI(Greek letter) MP($$M$$ember of $$P$$arliament).  Fortunately Pan uses "letter" instead of "relationship" as Chifonie did in last Thursday's Guardian Cryptic leading to multiple comments on it alone.  (BTW, for those interested, tupu and I had 2 late posts on it, which some might not have seen.)
Defn:  This "solicitor" is not the person in a dark suit who tries to get you out of trouble with the court, but the one in flashy gear who tries to get you into trouble.  A solicitor for the oldest profession, making his/her the second oldest profession, surely.