Female, a gem that cheat pulls (4,3)
I believe the answer is:
fast one
'that cheat pulls' is the definition.
(to pull a fast one is to cheat or deceive)
'female a gem' is the wordplay.
'female' becomes 'f' (common abbreviation).
'gem' becomes 'stone' (I've seen this before).
'f'+'a'+'stone'='FAST ONE'
(Other definitions for fast one that I've seen before include "may have been pulled in cheating allegation?" , "Runner" , "might be pulled by 20 [HUSTLER] ?" , "Such as Bolt" .)