Related Clues:

• Pie in the __ (improbable idea)
• It's the limit, it's said
• A number rule the roost, to some extent
• Where a telescope points
• Solvent; clear sky
• Optimist's ''limit''
• Stars are seen in it
• Old number — some leave the room
• Where to see clouds
• I'm volatile in that place, the first to rise up
• Unlimited limit?
• N.C.A.A.'s Big ___ Conference
• Some chose the right anaesthetic
• What radio signals travel through, with 'the'
• Big ___ Country (Montana)