Crossword Genius

Looks closely at Cockney cocktails (8)

Ross

I believe the answer is:

eyeballs

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

'looks' is the definition.
(eyeballing is a kind of looking)

I don't understand the remainder of the clue.

Can you help me to learn more?

I've seen this clue in The Guardian.
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