Crossword Genius

Confronted letters sent back regarding coffee (5)

Ross

I believe the answer is:

decaf

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'coffee' is the definition.
(type of coffee)

I can't explain the rest of the clue.

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(Other definitions for decaf that I've seen before include "Less stimulating coffee?" , "Cup substitute missing kick" , "Style of coffee" , "Coffee without the kick?" , "Type of coffee" .)

I've seen this clue in The Irish Times.
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