Related Clues:

• Is the North only synthetic?
• It's only synthetic below the North
• Is the North only synthetic? (5)
• On the end of what's synthetic
• Catch up with the number that's never cheaper
• The thread is fine enough to be made to what I sell
• The only synthetic of the North
• It's cotton but not rotten so I sell it
• Perhaps it's thready for the island at last
• Only the North could be so synthetic
• That'll catch your number back, and that's the price of you
• Son, with ten back you can make it short inversely
• Catch this up for X
• Get X back, but there may be a catch in it
• Not at all a gross price as one gets ten back from it