Crossword Genius

Jar in which to put coal (5)

Ross

I believe the answer is:

grate

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'jar' is the definition.
(make unpleasant sound)

I don't understand the rest of the clue.

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(Other definitions for grate that I've seen before include "Jar; fireplace" , "in which Santa lands?" , "Grind, rasp" , "part of fireplace" , "Rasp; fire holder" .)

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