Horse or bear? (4)
I believe the answer is:
hack
I believe this clue is a double definition.
'horse' is the first definition.
(I know that hack is a type of horse)
'bear?' is the second definition.
(both can mean to endure or tolerate something)
'or' acts as a link.
(Other definitions for hack that I've seen before include "Tired old horse" , "mediocre writer" , "Wildly kick; dull writer" , "Journo" , "Cut - mediocre journalist" .)