Unfinished platform for male (4)
I believe the answer is:
stag
'for male' is the definition.
(a stag is a male deer)
'unfinished platform' is the wordplay.
'unfinished' means to remove the last letter.
'platform' becomes 'stage' (stage is a kind of platform).
'stage' with its final letter removed is 'STAG'.
(Other definitions for stag that I've seen before include "Hunted animal" , "Animal - for men only" , "one may get in a rut" , "without female escort" , "party given by Uncle Sam" .)