Related Clues:

• Sweetener to gag our party and Queen?
• Price of silence?
• Notes the teller won't get?
• Spooner's semi-solid sugar? You can't tell with this sweetener
• Silence is golden when this is paid?
• Sum for keeping mum
• Bribe paid to ensure silence
• The cost of quiet, say (In this answer, note letters 1 and 6-9)