Bargain event (4)
I believe the answer is:
sale
'bargain event' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sale that I've seen before include "Period of reduced prices" , "Disposal of shop's stock at reduced prices" , "Auction - somewhere in Greater Manchester" , "Disposal - auction" , "From which one may get bargains" .)