Crossword Genius

Gets into line, prepared for a roasting (7)

Ross

I believe the answer is:

dressed

'prepared for a roasting' is the definition.
(as in dressing meat for roasting)

I can't explain the remainder of the clue.

(Other definitions for dressed that I've seen before include "When you buy them crabs might be" , "Clothed" , "as a crab may be?" , "finery?" , "Put on clothes" .)

I've seen this clue in The Guardian.
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