Real female identity in Beano possibly (4,4)
I believe the answer is:
bona fide
'real' is the definition.
(I've seen this in another clue)
'female identity in beano possibly' is the wordplay.
'female' becomes 'f' (common abbreviation).
'identity' becomes 'id' (abbreviation).
'in' is an insertion indicator.
'possibly' is an anagram indicator.
'f'+'id'='fid'
'beano' is an anagram of 'bonae'.
'fid' inserted inside 'bonae' is 'BONA FIDE'.
(Other definitions for bona fide that I've seen before include "honest - with 12a" , "it's on the level" , "Genuine or in good faith" , "Genuine, without fraud - in Latin" , "Authentic" .)