Quick reply made to a welcome guest? (8)

I believe the answer is:

comeback

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'quick reply' is the definition.
'comeback' can be an answer for 'reply' (thesaurus). I'm not sure about the 'quick' bit.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for comeback that I've seen before include "Make a . . . . . . . . - return to the fray" , "rejoinder" , "Return to former success" , "Revival" , "A return to prominence" .)

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

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