Related Clues:

• "The sky's the ___!"
• Place a maximum on
• Place restrictions on
• Two per customer, say
• Restrict(ion)
• One per customer, e.g
• Confine within bounds
• The sky, at times?
• I'm fired about restrictive practice
• Road having lights all round - speed restriction applied
• Place bound on
• Receiving illumination about note, in the end
• Left one million, I start to take control
• Keep in with maximum number
• Bound, restriction