Coins fashioned using sound (5)
I believe the answer is:
sonic
'sound' is the definition.
(sonic means relating to sound)
'coins fashioned' is the wordplay.
'fashioned' indicates anagramming the letters.
'coins' with letters rearranged gives 'SONIC'.
'using' is the link.
(Other definitions for sonic that I've seen before include "Producing sound" , "Type of boom" , "Employing sound" , "Hedgehog" , "Involving sound waves, say a boom" .)