Crossword Genius

Device for drying vessel that's found in circus (7)

Ross

I believe the answer is:

tumbler

I'm a little stuck... Click here to teach me more about this clue!

'device' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?

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

Can you help me to learn more?

(Other definitions for tumbler that I've seen before include "One repeatedly turning over" , "spilling its contents?" , "might be full of drink" , "Machine for drying" , "used to drink" .)

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