Related Clues:

• Plainly expressed
• Sign on a shop's door
• Relatively free
• Ready to accept customers
• Porous
• '___ sesame'
• Candid or unlocked
• Frank and unlocked
• Not shut up or hidden
• Open and obvious
• Candid and undisguised
• Plain and obvious
• Open and unconcealed
• Open and observable
• Unfurl