Crossword Genius

Correspondents shed, first to last (5)

Ross

I believe the answer is:

hacks

'correspondents' is the definition.
(hack can mean a journalist)

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

(Other definitions for hacks that I've seen before include "Press" , "kicks on the shin" , "Nags" , "cuttings" , "Horses; journalists" .)

I've seen this clue in The Times.
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