Share everything exaggerated about males (9)
I believe the answer is:
allotment
'share' is the definition.
(allotment is a kind of share)
'everything exaggerated about males' is the wordplay.
'everything' becomes 'all' (all things).
'exaggerated' becomes 'OTT' (short for 'over the top').
'about' indicates putting letters inside.
'males' becomes 'men' (man is a kind of male).
'ott' enclosing 'men' is 'otment'.
'all'+'otment'='ALLOTMENT'
(Other definitions for allotment that I've seen before include "cultivated area" , "Distribution of shares" , "Plot of land rented for growing vegetables" , "allocation" , "grant?" .)