Approved feature of friend or seducer (8)
I believe the answer is:
endorsed
'approved' is the definition.
(endorsing is a kind of approving)
'feature of friend or seducer' is the wordplay.
'feature of' says the answer is hidden in the clue.
'ENDORSED' is hidden within 'friend or seducer'.
(Other definitions for endorsed that I've seen before include "Publicly declared support (for something)" , "Confirmed a statement or signed back of cheque" , "Certified or supported" , "Seconded" , "Approved and backed" .)