Tories cage working classes (10)
I believe the answer is:
categories
'classes' is the definition.
('category' can be a synonym of 'class')
'tories cage working' is the wordplay.
'working' is an anagram indicator.
'tories'+'cage'='toriescage'
'toriescage' with letters rearranged gives 'CATEGORIES'.
(Other definitions for categories that I've seen before include "classes" , "classifications" .)