Flirts and is captivated by her lips perhaps (10)
I believe the answer is:
philanders
'flirts' is the definition.
('philander' can be a synonym of 'flirt')
'and is captivated by her lips perhaps' is the wordplay.
'is captivated by' is an insertion indicator.
'perhaps' indicates anagramming the letters.
'her'+'lips'='herlips'
'herlips' anagrammed gives 'philers'.
'and' going into 'philers' is 'PHILANDERS'.
(Other definitions for philanders that I've seen before include "Puts it about a bit" , "flirts" .)