Crossword Genius

Poet refusing opening offer? (6)

Ross

I believe the answer is:

hitman

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'offer?' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

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(Other definitions for hitman that I've seen before include "killer" , "Assassin" , "offer?" , "Hired gun" .)

I've seen this clue in The Independent.
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