Crossword Genius

Rock star admits it (6)

Ross

I believe the answer is:

bonito

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'rock' is the definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'star admits it' is the wordplay.
'star' becomes 'bono' (I can't justify this - if you can you should give a lot more credence to this answer).
'admits' means one lot of letters goes inside another.
'bono' going around 'it' is 'BONITO'.

Can you help me to learn more?

(Another definition for bonito that I've seen is " Fish".)

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