Part of Antrim, a rich source of ceramic (5)
I believe the answer is:
imari
'ceramic' is the definition.
I know nothing about this answer so I can't judge whether this works.
'part of antrim a rich source' is the wordplay.
'part of' says the answer is hidden in the clue.
'IMARI' is hidden within 'antrim a rich source'.
'of' is the link.
Can you help me to learn more?
(Other definitions for imari that I've seen before include "pieces of porcelain" , "Style of Japanese porcelain" , "decorative porcelain" , "Japanese pots" , "exotic porcelain" .)