Flower unspoiled with head missing (3)

I believe the answer is:

ure

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'flower' is the definition.
(River Ure)

I can't explain the rest of the clue.

(Other definitions for ure that I've seen before include "River at Ripon" , "Midge --, singer" , "Wensleydale river" , "Ripon's river" , "River of N. Yorkshire" .)

I've seen this clue in The Sun.

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