Crossword Genius

Wonderful workers in a bottling factory? (7)

Ross

I believe the answer is:

corkers

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

'wonderful workers' is the definition.
Although both the answer and definition are plural nouns, I cannot see how they can define each other.

I don't understand how the remainder of the clue works.

Can you help me to learn more?

I've seen this clue in the Evening Standard.
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