Related Clues:

• Tip slightly
• Bit of advice for those three turning up in hospital
• Leaning Tower of Pisa feature
• Reward for the waitstaff
• Reward for a waiter
• Lean to the left, say
• Word following "hot" or "wing"
• Incline somewhat
• Dough in a jar, perhaps
• Hint mine will return
• Money for service
• Chalked part of a cue stick
• You could wait for it
• Money in a jar, maybe
• A cash one is generally preferred