Possible Clues:

• Drink from a small city has no finish - to the Spanish it's similar to 12 across
• Duck swallows heads of tadpoles on western embankment, as it's useful for drying off
• What's used for drying dishes
• Wee total (anag) — drier
• Drink until we start to learn means of getting dry
• Source of milk old, source of water virtually drier