Correspond with head of college about criminal record (7)
I believe the answer is:
conform
'correspond with' is the definition.
'head of college about criminal record' is the wordplay.
'head of' indicates taking the first letters.
'about' becomes 'on'.
'criminal record' becomes 'form' (I've seen this in other clues**).
The initial letter of 'college' is 'c'.
'c'+'on'+'form'='CONFORM'
(Other definitions for conform that I've seen before include "become fitter?" , "Run with the pack" , "Toe the line" , "Comply with accepted rules" , "Agree" .)