Wild flower (9)

I believe the answer is:

buttercup

'wild flower' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for buttercup that I've seen before include "Common yellow flower" , "Bumboat woman" , "Flowering plant" , "Meadow flower poisonous to cattle" , "Common meadow flower" .)

I've seen this clue in The Times, The Telegraph, the Evening Standard and The Guardian.

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