Sweet-talk (7)
I believe the answer is:
flatter
'sweet-talk' 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 "Comparatively deflated" , "Possibly imitate" , "Become" , "with fewer bubbles" , "Offer insincere compliments, butter up" .)