Face a fine promenade (7)
I believe the answer is:
affront
'face' is the definition.
(thesaurus)
'a fine promenade' is the wordplay.
'fine' becomes 'f' (abbreviation).
'promenade' becomes 'front' (sea front).
'a'+'f'+'front'='AFFRONT'
(Other definitions for affront that I've seen before include "Offend; offence" , "Cause of outrage or offence" , "Rant off over insult" , "Offend the modesty or values of (someone)" , "Deliberate insult or show of disrespect" .)