The female has been a boozer! (7)
I believe the answer is:
shebeen
'a boozer' is the definition.
(term for a disreputable drinking establishment)
'the female has been' is the wordplay.
'the female' becomes 'she' ('she' refers to a woman).
'has' means one lot of letters go next to another.
'she'+'been'='SHEBEEN'
(Other definitions for shebeen that I've seen before include "Alcohol sold without licence" , "dive" , "Where alcoholic drink is sold illegally" , "Unlicenced house selling alcohol (Ireland)" , "in which spirits may be found" .)