Cancel boat gear ordered (8)
I believe the answer is:
abrogate
'cancel' is the definition.
(thesaurus)
'boat gear ordered' is the wordplay.
'ordered' is an anagram indicator.
'boat'+'gear'='boatgear'
'boatgear' with letters rearranged gives 'ABROGATE'.
(Other definitions for abrogate that I've seen before include "Do away with" , "Formally cancel (an agreement)" , "Cancel or repeal, say a law" , "Annul or revoke" , "stop" .)