Crossword Genius

Irish writer lost heart to broad (4)

Ross

I believe the answer is:

wide

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'broad' is the definition.
('wide' can be a synonym of 'broad')

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for wide that I've seen before include "lax in morals" , "Gaping" , "Expansive" , "Broad - extra" , "Of vast scope" .)

I've seen this clue in the Irish Times (Crosaire) and the Irish Times.
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