Crossword Genius

Skilled worker in the main? (9)

Ross

I believe the answer is:

craftsman

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

This could be a double definition.

'skilled worker' is the first definition.
(craftsman is a kind of skilled worker)

'main?' is the second definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.

'in the' is the link.

Can you help me to learn more?

(Other definitions for craftsman that I've seen before include "Expert" , "Artisan" , "Skilled worker" , "Carpenter, say" .)

I've seen this clue in The Globe and Mail.
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