Related Clues:

• Gain
• Representing (with "on")
• Charity affair
• On ___ of (as a proxy for)
• On-of link
• Nonpaying gig
• Be of help to
• Employer's offering
• Sake or interest
• Fund-raising event
• Boon
• Pro bono show
• Eastern quaff that's typically 18-25% alcohol
• On ...... of; as reps of
• Fine bet on to produce an advantage