Crossword Genius

This could be blooming thing Cinderella lost? (5-7)

Ross

I believe the answer is:

ladys-slipper

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'this could be blooming' is the definition.
(type of flowering plant)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for ladys-slipper that I've seen before include "Type of orchid" , "Wild orchid (for Cinderella?)" .)

I've seen this clue in The Telegraph.
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