Possible Clues:

• Parts of alimentary canals between pharynges and stomachs
• Passages in Poe so bad, old lady is skipping the second half
• Tubes out of shape, I go beyond circle
• 'May I have your attention' admits false hope with gas pipes
• Sophie has a go, replacing inner tubes
• Food transport vehicles
• Hoop that is getting tangled with gas pipes
• Fare-taking primary transport routes?
• Hope, as I go travelling in parts of canals
• Ohio pages rewritten for those in biology class linking throats and stomachs