Pervert isn't in heavy make-up? (3,5)
I believe the answer is:
war paint
'heavy make-up?' is the definition.
'war paint' can be an answer for 'make-up?' (I've seen this before). I am unsure of the 'heavy' bit.
'pervert isn't' is the wordplay.
'pervert' becomes 'warp' (I've seen this in another clue).
'isn't' becomes 'aint' (non-standard version of 'isn't').
'warp'+'aint'='WAR-PAINT'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for war paint that I've seen before include "Facial decoration showing hostile intent" , "put on a brave face?" , "what woman may have to face" , "Make-up (for native Americans?)" , "Make-up (colloq.)" .)