Curving inwards (7)

I believe the answer is:

concave

'curving inwards' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for concave that I've seen before include "Bending inwards" , "Hollow" , "Curving inward" , "Curving inwards" , "Curved inwards" .)

I've seen this clue in the Evening Standard and The Mirror.

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