Bring up the topic of the said item of jewellery (6)
I believe the answer is:
broach
'bring up' is the definition.
(I've seen this before)
'said item of jewellery' is the wordplay.
'said' indicates a 'sounds like' (homophone) clue.
'item of jewellery' becomes 'brooch'.
'brooch' sounds like 'BROACH'.
'the topic of the' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for broach that I've seen before include "Hint" , "Raise (a sensitive topic)" , "Start to talk about" , "Raise a topic for discussion" , "Bring up for discussion" .)