Praise insincerely (7)
I believe the answer is:
flatter
'praise insincerely' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for flatter that I've seen before include "Over-praise" , "Please with undue praise" , "Less uneven, soft-soap" , "Less uneven; cause (someone) to feel honoured" , "flannel" .)