A politician prevaricated about one female and added more detail (9)
I believe the answer is:
amplified
'added more detail' is the definition.
(amplify can mean to expand on something)
'a politician prevaricated about one female' is the wordplay.
'politician' becomes 'MP' (Member of Parliament).
'prevaricated' becomes 'lied' (I've seen this in another clue).
'about' indicates putting letters inside.
'one' becomes 'i' (Roman numeral).
'female' becomes 'f' (abbreviation).
'i'+'f'='if'
'lied' placed around 'if' is 'lified'.
'a'+'mp'+'lified'='AMPLIFIED'
'and' acts as a link.
(Other definitions for amplified that I've seen before include "Made louder" , "Intensified" , "increased in loudness" .)