Crossword Genius

Crazy for ceramics? (5)

Ross

I believe the answer is:

potty

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This could be a double definition.

'crazy' is the first definition.
(I've seen this before)

'ceramics?' is the second definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.

'for' is the link.

Can you help me to learn more?

(Other definitions for potty that I've seen before include "Daft (informal)" , "Where kids go" , "Crazy (colloq.)" , "Bonkers" , "Mad" .)

I've seen this clue in The Mirror.
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