With audacity, learner joins expert making piece of jewellery (8)
I believe the answer is:
necklace
'piece of jewellery' is the definition.
(I've seen this before)
'with audacity learner joins expert' is the wordplay.
'with' says to put letters next to each other.
'audacity' becomes 'neck' (I've seen this before).
'learner' becomes 'l'.
'joins' means one lot of letters go next to another.
'expert' becomes 'ace' (ace is a kind of expert**).
'neck'+'l' is 'neckl'.
'neckl'+'ace'='NECKLACE'
'making' is the link.
(Other definitions for necklace that I've seen before include "Choker perhaps" , "Ornamental string" , "Decorative chain" , "String of beads, perhaps" , "Jewellery worn around the neck" .)