Idiots accepting leader of Tories' qualities (6)
I believe the answer is:
assets
'qualities' is the definition.
(asset is a kind of quality)
'idiots accepting leader of tories'' is the wordplay.
'idiots' becomes 'asses' (I've seen this before).
'accepting' is an insertion indicator.
'leader of' suggests taking the first letters.
The initial letter of 'tories' is 't'.
'asses' enclosing 't' is 'ASSETS'.
(Other definitions for assets that I've seen before include "Valuables, things worth having" , "Possessions and resources" , "worldly goods" , "Personal wealth" , "Possessions of material value" .)