Crossword Genius

Is smoking it hard work? (3)

Ross

I believe the answer is:

fag

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'work?' is the definition.
(fagging is a kind of working)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for fag that I've seen before include "Hard work - cigarette (slang)" , "Tiring task; cigarette" , "He'll do anything you ask" , "Tedious chore" , "an awful bore!" .)

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