Crossword Genius

Nine-sided figure (7)

Ross

I believe the answer is:

nonagon

'nine-sided figure' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for nonagon that I've seen before include "Nine-sided polygon" , "Figure with nine, twenty-one Dn" , "Nine sided figure" , "Figure with nine sides" , "Nine-sided shape" .)

I've seen this clue in the Evening Standard, The Times, The Mirror, the Sydney Morning Herald and The Independent.
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