Grown-up with one leg to accept answer as flattery (9)
I believe the answer is:
adulation
'flattery' is the definition.
(I've seen this in another clue)
'grown-up with one leg to accept answer' is the wordplay.
'grown-up' becomes 'adult' (informal term for an adult).
'with one' becomes 'i' (Roman numeral. I am not sure about the 'with' bit.).
'leg' becomes 'on' (cricket term, fielding positions).
'to accept' indicates putting letters inside.
'answer' becomes 'a' (abbreviation eg in Q and A).
'adult'+'i'+'on'='adultion'
'adultion' enclosing 'a' is 'ADULATION'.
'as' acts as a link.
(Other definitions for adulation that I've seen before include "Fulsome praise" , "pats on the back" , "Worshipping" , "Servile flattery" , "Hero-worship" .)