Female is not in swoon (5)
I believe the answer is:
faint
'swoon' is the definition.
(I know that swoon can be written as faint)
'female is not' is the wordplay.
'female' becomes 'f' (common abbreviation).
'is not' becomes 'aint' (non-standard version of 'isn't').
'f'+'aint'='FAINT'
'in' is the link.
(Other definitions for faint that I've seen before include "woozy" , "Lacking clarity" , "Pale - pass out" , "dull" , "hard to hear" .)