Convey with you a top bright piece of jewellery (5)
I believe the answer is:
bring
'convey with' is the definition.
'bring' can be an answer for 'convey' (synonyms). I am not certain of the 'with' bit.
'a top bright piece of jewellery' is the wordplay.
'a top' says to take the initial letters (in a down clue, the first letter is top).
'piece of jewellery' becomes 'ring' (type of jewellery item).
The initial letter of 'bright' is 'b'.
'b'+'ring'='BRING'
'you' is the link.
Can you help me to learn more?
(Other definitions for bring that I've seen before include "Escort" , "Convey" , "Fetch; cause to come" , "Come along with" , "Carry (to a place)" .)