Extract revealing masculine type (4)
I believe the answer is:
milk
'extract' is the definition.
(milking is a kind of extracting)
'masculine type' is the wordplay.
'masculine' becomes 'm'.
'type' becomes 'ilk' (I've seen this before).
'm'+'ilk'='MILK'
'revealing' acts as a link.
(Other definitions for milk that I've seen before include "an early delivery?" , "Use" , "A white drink" , "Nourishing fluid produced by mammals" , "Source of cream/butter" .)