Primarily stocks porcelain (5)
I believe the answer is:
imari
'porcelain' is the definition.
(I've seen this before)
'primarily stocks' is the wordplay.
'stocks' says the answer is hidden in the clue.
'IMARI' can be found hidden inside 'primarily'.
(Other definitions for imari that I've seen before include "Jap. ware" , "Japanese pots" , "China from Japan" , "Pottery" , "Colourful porcelain" .)