Shrink from a man in uniform? On the contrary (5)
I believe the answer is:
freud
'shrink' is the definition.
(Sigmund Freud - 'shrink' can mean a psychiatrist)
'a man in uniform? on the contrary' is the wordplay.
'a man' becomes 'r' (abbreviation for rook, a chess piece or 'man').
'in' indicates putting letters inside.
'uniform? on the contrary' becomes 'feud' (I can't explain this - if you can you should believe this answer much more).
'r' inserted within 'feud' is 'FREUD'.
'from' is the link.
(Other definitions for freud that I've seen before include "Psychoanalysis pioneer" , "See 9" , "Painter" , "One introducing ID" , "See 17" .)