Related Clues:

• Not obvious, as feelings
• Type of tube
• Not inner
• __ tube (tire part)
• Word before Mongolia
• Word before city or workings
• Surrounding
• Word with tube or ear
• Further away
• __ sanctum
• Felt but not seen
• Word before city or circle
• Word before tube or circle
• ___ Banks
• "The __ Limits": sci-fi fare