Plant working for china maker (6)
I believe the answer is:
minton
'china maker' is the definition.
(potter Thomas Minton)
'plant working' is the wordplay.
'plant' becomes 'mint' (mint is a kind of plant).
'working' becomes 'on'.
'mint'+'on'='MINTON'
'for' acts as a link.
(Other definitions for minton that I've seen before include "Pottery firm" , "Stoke china" , "English pottery company" , "ceramicist" .)