Related Clues:

• Sign on a shop's door
• Relatively free
• Uncork, to Falstaff
• Ready to accept customers
• Porous
• '___ sesame'
• Candid or unlocked
• Frank and unlocked
• Not shut up or hidden
• Candid and undisguised
• Unfurl
• Frank, not secret
• Frank and candid
• Frank and unconcealed
• Candid, being unlocked