Tin-glazed earthenware (5)
I believe the answer is:
delft
'tin-glazed earthenware' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for delft that I've seen before include "Netherlands town famed for pottery" , "Dutch blue and white glazed earthenware" , "City in the Netherlands" , "Potter production" , "Netherlands town famous for its pottery" .)