Crossword Genius

Potter's medium (4)

Ross

I believe the answer is:

clay

'potter's medium' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for clay that I've seen before include "Brick/pottery substance" , "slip" , "Basis of pottery" , "Material used for bricks, ceramics etc" , "Earthenware" .)

I've seen this clue in The Guardian, the King Feature Syndicate, the Newsday and The Times.
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