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 an anagram.
'coins' is an anagram of 'SONIC'.
'using' acts as a 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" .)