Well–known female friend and perjurer (8)
I believe the answer is:
familiar
'well-known' is the definition.
(similar in meaning)
'female friend and perjurer' is the wordplay.
'female' becomes 'f' (common abbreviation).
'friend' becomes 'ami' ('friend' in French).
'and' is a charade indicator (letters next to each other).
'perjurer' becomes 'liar' (a perjurer lies in court).
'f'+'ami'+'liar'='FAMILIAR'
(Other definitions for familiar that I've seen before include "Well-known witch's cat" , "Well known from long association" , "Well-acquainted with a witch's cat" , "Well-known, easily recognisable" , "forward" .)