Crossword Genius

Wrapper cake’s missing at home (4)

Ross

I believe the answer is:

muff

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'wrapper' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I can't see?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for muff that I've seen before include "something to keep her hands warm" , "where hands may need a warm-up" , "Hand-warmer - from Donegal?" , "Tube of fur - handle clumsily" , "Fur tube for keeping hands warm" .)

I've seen this clue in The Times.
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