Possible Clues:

• It's a gift to those joining The Party and the key to getting into The House perhaps?
• It may be opened at a party
• Certain annual gift
• It's expected once a year
• Third failing to be accepted by Brown here for annual award?
• Do hard by it — quietly take exception to gift
• Party? Bender? Turned up with this box?
• Party donation could be the key to the House?
• Annual gift
• Partygoer's purchase