Related Clues:

• Lap
• Generous bar buy
• Ammo unit
• Eighteen holes, for example
• 18 holes, e.g.
• Boxing unit
• Unit of applause
• Punching-out period?
• Quarterfinals or semifinals
• Golf session
• Three minutes in the ring
• Encircling
• Set of drinks for the table
• Regular route for a sentry
• O, that's it!