Concerned with sound coins, perhaps (5)
I believe the answer is:
sonic
'concerned with sound' is the definition.
I can't judge whether this definition defines the answer.
'coins perhaps' is the wordplay.
'perhaps' indicates anagramming the letters.
'coins' with letters rearranged gives 'SONIC'.
Can you help me to learn more?
(Other definitions for sonic that I've seen before include "Type of boom" , "Involving sound waves, say a boom" , "Hedgehog" , "Producing sound" , "Using waves" .)