Crossword Genius

Forcibly return a shoe (9)

Ross

I believe the answer is:

slingback

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'shoe' is the definition.
(I know that slingback is a type of shoe)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for slingback that I've seen before include "item of footwear" , "shoe" .)

I've seen this clue in The Daily Express.
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