Possible Clues:

• PM tied me in knots as a hindrance
• Barrier
• This person's architectural feature creates an obstruction
• Check naughty child's revision, including primarily music, English and numeracy
• The speaker's standing on section of facade or barrier
• Check setter's trapped, without a little money
• Bar in vacated interim structure
• I am at the end of the building, but that is no help at all