Kinsey topic (3)
I believe the answer is:
sex
'kinsey topic' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sex that I've seen before include "This symbol is epitome of glamour" , "Gender" , "Expert in the treatment of coital problems" , "Male or female" , "Hanky-panky" .)