One arranged to keep ten cattle (4)
I believe the answer is:
oxen
'cattle' is the definition.
(type of cattle)
'one arranged to keep ten' is the wordplay.
'arranged' indicates an anagram (letters rearranged).
'to keep' indicates putting letters inside.
'ten' becomes 'X' (Roman numeral).
'one' with letters rearranged gives 'oen'.
'oen' placed around 'x' is 'OXEN'.
(Other definitions for oxen that I've seen before include "Beef stock" , "Cows and bulls" , "Neat types" , "Bullocks" , "strong animals" .)