Related Clues:

• "The sky's the ___!"
• Place a maximum on
• See 28 Down
• Soul producer
• Place restrictions on
• Cutting-___ (like the latest technology)
• Towards the end, knowledge is on the limit
• On ___ (nervous)
• Two per customer, say
• Restrict(ion)
• Living on the ___
• Club losing initial advantage
• It's often cutting
• Borderline advantage?
• Tip or top