Crossword Genius

Celebrated Irish author said to have florid coat (8)

Ross

I believe the answer is:

rejoiced

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

I cannot understand how the rest of the clue works.

(Other definitions for rejoiced that I've seen before include "Celebrated" , "Was glad" , "Felt great elation" , "Felt great joy" , "Exulted, made merry" .)

I've seen this clue in The Guardian.
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