Left the last word to the auctioneer (4)
I believe the answer is:
gone
'left' is the definition.
(go can mean to leave)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for gone that I've seen before include "Moved - died" , "Absent" , "No longer present" , "Away, departed" , "Departed or dead" .)