Horse tender (6)
I believe the answer is:
ostler
'horse tender' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ostler that I've seen before include "Inn servant" , "ER lost (anag) - former stableman" , "Inn attendant (hist.)" , "Groom at inn" , "Nags for me" .)