He is in female camouflage (4)
I believe the answer is:
alec
'he' is the definition.
(I've seen this before)
'in female camouflage' is the wordplay.
'in' indicates a hidden word.
'ALEC' can be found hidden inside 'female camouflage'.
'is' acts as a link.
(Other definitions for alec that I've seen before include "A smart . . . . is a know-all in lace" , "Smart ..., he thinks he knows everything" , "Actor Guinness is smart" , "Boy's name (a smart one?)" , "Smart chap" .)