Answer:

bidder

AnswerCrossword Clue
BIDDERSotheby's patron
BIDDEROne in action at an auction
BIDDERAuction participant
BIDDERAuction attendee
BIDDERPaddle holder at an auction
BIDDEReBay customer
BIDDERDummy's partner.
BIDDERBridge player.
BIDDERBridge player, at times
BIDDERGoren, at times
BIDDERSotheby's visitor
BIDDERNodding one, sometimes
BIDDERNorth, perhaps
BIDDEReBay user
BIDDEReBay user, perhaps