Bring up the subject of the said item of jewellery (6)
I believe the answer is:
broach
'bring up' is the definition.
(I've seen this in another clue)
'said item of jewellery' is the wordplay.
'said' shows a homophone (sound like).
'item of jewellery' becomes 'brooch'.
'brooch' is a homophone of 'BROACH'.
'the subject of the' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for broach that I've seen before include "Bring up a topic" , "Pierce (a cask)" , "Bring up for discussion" , "Hint" , "Raise (a sensitive topic)" .)