Crossword Genius

Playwright unknown in China? (7)


I believe the answer is:

'china?' is the definition.

'playwright unknown' is the wordplay.
'playwright' becomes 'Potter' (playwright Dennis Potter).
'unknown' becomes 'y' (algebra).

'in' acts as a link.

(Other definitions for pottery that I've seen before include "Goods of fired clay", "Items made from clay", "Ceramics factory", "baked goods", "Items of fired clay".)

I've seen this clue in Independent.