Rescind order to a barge (8)
I believe the answer is:
abrogate
'rescind' is the definition.
(I've seen this before)
'order to a barge' is the wordplay.
'order' indicates an anagram.
'to'+'a'+'barge'='toabarge'
'toabarge' anagrammed gives 'ABROGATE'.
(Other definitions for abrogate that I've seen before include "Do away with" , "End" , "Get rid of" , "stop" , "Abolish formally" .)