Crossword Genius

Percussion instruments boost icons on The Voice (6,7)

Ross

I believe the answer is:

finger cymbals

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

'percussion' is the definition.
(thesaurus)

'instruments boost icons on the voice' is the wordplay.
I cannot quite understand how this works, but
'instruments' could be 'cymbals' (cymbal is a kind of instrument) and 'cymbals' is located in the answer.
The remaining letters 'finger' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.
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