Despot left in dishonour (6)
I believe the answer is:
stalin
'despot' is the definition.
(Joseph Stalin)
'left in dishonour' is the wordplay.
'left' becomes 'l' (common abbreviation).
'in' is an insertion indicator.
'dishonour' becomes 'stain' (stain can mean dishonour or disgrace).
'l' inserted inside 'stain' is 'STALIN'.
(Other definitions for stalin that I've seen before include "Lenin's successor" , "Notorious dictator of Latins" , "Mass-murderer" , "Russian WW2 leader" , "Russian WW2 dictator" .)