Cancel yearly bar crawl at centre (5)
I believe the answer is:
annul
'cancel' is the definition.
(annulling is a kind of cancelling)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for annul that I've seen before include "Cancel, make void" , "Declare void" , "Cancel, abolish" , "Cancel, revoke" , "Render invalid" .)