Feed dog (4)
I believe the answer is:
chow
This clue is a double definition.
'feed' is the first definition.
(thesaurus)
'dog' is the second definition.
(short for chow chow)
(Other definitions for chow that I've seen before include "Barker" , "Long-haired Chinese dog or slangy food" , "Food (colloq.)" , "Grub" , "Nosh" .)