Crossword Genius

Smoothed over incisively (6)

Ross

I believe the answer is:

planed

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'smoothed' is the definition.
(I've seen this in another clue)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for planed that I've seen before include "Levelled off" , "having gone up in aircraft" .)

I've seen this clue in the Evening Standard.
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