Bones around silver food container (7)
I believe the answer is:
nosebag
'food container' is the definition.
(food bag hung from an horse's head)
'bones around silver' is the wordplay.
'around' indicates anagramming the letters.
'silver' becomes 'Ag' (Ag is the chemical symbol for silver).
'bones' is an anagram of 'noseb'.
'noseb'+'ag'='NOSEBAG'
(Other definitions for nosebag that I've seen before include "Arab may eat" , "Feeder strapped on horse" , "Portable container for horse's food" , "Horse's fodder container" , "Horse's fodder pouch" .)