First buyers fish for a particular piece of adornment (6)
I believe the answer is:
bangle
'adornment' is the definition.
(bangle is a kind of adornment)
'first buyers fish' is the wordplay.
'first buyers' becomes 'b' (1st letter of 'buyers').
'fish' becomes 'angle' (synonyms).
'b'+'angle'='BANGLE'
'for a particular piece of' 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 bangle that I've seen before include "Metal armband" , "Item of jewellery" , "Rigid bracelet or anklet" , "Arm-ring" , "A bracelet from Bengal" .)