Horse kept only for hire (4)

I believe the answer is:
hack
(Other definitions for hack that I've seen before include "Chop - reporter" , "Cut roughly - routine writer" , "jade" , "Tired old horse" , "Ride" .)
I believe the answer is:
hack
(Other definitions for hack that I've seen before include "Chop - reporter" , "Cut roughly - routine writer" , "jade" , "Tired old horse" , "Ride" .)