Bishop gets consumed and vanquished (6)
I believe the answer is:
beaten
'vanquished' is the definition.
(beating is a kind of vanquishing)
'bishop gets consumed' is the wordplay.
'bishop' becomes 'b' (abbreviation used in chess).
'gets' is a charade indicator (letters next to each other).
'consumed' becomes 'eaten' ('eaten' can be similar in meaning to 'consumed').
'b'+'eaten'='BEATEN'
'and' acts as a link.
(Other definitions for beaten that I've seen before include "Defeated - whipped" , "Defeated or mixed vigorously" , "Formed or made thin by hammering" , "(Of food) whipped" , "Describes a path much trodden" .)