Crossword Genius

Hit on perfect comeback to sweet-talk (6,2)

Ross

I believe the answer is:

butter up

I'm a little stuck... Click here to teach me more about this clue!

'sweet-talk' is the definition.
(both can mean to flatter someone)

'hit on perfect comeback' is the wordplay.
'hit on' becomes 'butt' (eg headbutting. I am not sure about the 'on' bit.).
'perfect' becomes 'pure' (synonyms).
'comeback' is a reversal indicator.
'pure' reversed gives 'erup'.
'butt'+'erup'='BUTTER UP'

'to' acts as a link.

Can you help me to learn more?

(Other definitions for butter up that I've seen before include "Flatter using dairy product? (6, 2)" , "Flatter in order to get something" , "Flatter to obtain favour" , "like 17 [SWEET TALK]" , "mountain goat?" .)

I've seen this clue in The Guardian.
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