Related Clues:

• It's in the net
• Keep me quiet in the net
• Being synthetic, it's made of only Nitrogen
• The North gets what's only all synthetic
• How the North is only synthetic
• The North is only twisted to a material extent
• Is the North only synthetic?
• It's only synthetic below the North
• Not like 11 across in the net
• Is the North only synthetic? (5)
• On the end of what's synthetic
• Be quiet! It's myself in the net
• It's for me to keep quiet if it's in the net
• The only synthetic of the North
• Only the North could be so synthetic