Related Clues:

• Seems as if it always flows from pole to pole
• That's what always flows between the poles
• Application filename extension
• Computer file extension
• English flower always placed in tin
• Program file ending
• A river always going in different directions
• Verne's undisciplined banker
• The night before, nurse put out flower
• River artist on the carpet making a comeback
• It flows always from south to north
• Cut to a point
• Flower always preserved?
• Reading, say, in 5 across 7, a long runner?
• Welsh and English river