Crossword Genius

Instrument's voice, even used with acoustic of large venue (7)

Ross

I believe the answer is:

ocarina

'instrument's' is the definition.
(ocarina is a kind of instrument)

'of large venue' is the wordplay.
'of' becomes 'o''.
'large venue' becomes 'carina' (I can't explain this - if you can you should give a lot more credence to this answer).
'o'+'carina'='OCARINA'

'voice even used with acoustic' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.

(Other definitions for ocarina that I've seen before include "music-maker" , "source of music" , "dated instrument" , "Terracotta wind instrument" , "Simple wind instrument" .)

I've seen this clue in The Guardian.
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