Pleasing adage about female model making a comeback (10)
I believe the answer is:
satisfying
'pleasing' is the definition.
(synonyms)
'adage about female model making a comeback' is the wordplay.
'adage' becomes 'saying' (I've seen this before).
'about' is an insertion indicator.
'female' becomes 'f' (common abbreviation).
'model' becomes 'sit' (e.g. for a painting).
'making a comeback' shows that the letters should be reversed in order.
'f'+'sit'='fsit'
'fsit' written backwards gives 'tisf'.
'saying' placed around 'tisf' is 'SATISFYING'.
(Other definitions for satisfying that I've seen before include "Pleasurable" , "enough?" , "Meeting (needs, etc)" , "filling" , "Cool" .)