Preen (5)
I believe the answer is:
primp
'preen' is the definition.
(I know that preen can be written as primp)
This is the entire clue.
(Other definitions for primp that I've seen before include "Make minor changes to one's appearance" , "Make small adjustments to one's appearance" , "Smarten up" , "Make fussy adjustments to one's appearance" , "Groom oneself elaborately" .)