Crossword Genius

Coins improved economic growth, making quite a noise (9)

Ross

I believe the answer is:

sonicboom

I'm a little stuck... Click here to teach me more about this clue!

'coins improved economic growth making quite a noise' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'coins improved economic growth making quite a noise' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'coins' is 'sonic' which is present in the answer.
'noise' could be 'boom' (boom is a kind of noise) and 'boom' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Daily Express.
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