Ten in one for cooking stock (4)
I believe the answer is:
oxen
'stock' is the definition.
(thesaurus)
'ten in one for cooking' is the wordplay.
'ten' becomes 'x' ('X' can be a synonym of 'ten').
'in' is an insertion indicator.
'for cooking' indicates an anagram.
'one' with letters rearranged gives 'oen'.
'x' placed within 'oen' is 'OXEN'.
(Other definitions for oxen that I've seen before include "Beasts of burden or domestic cattle" , "Bulls, buffaloes, etc" , "Domestic bovines" , "Domesticated bovines" , "Cows and bulls" .)