### Clue: Lose wind when seeking muddy shoal in Cheshire estuary (7)
### Answer: DEFLATE 
 ### Explanation: Definition: Lose wind
  FLAT(sand bank in shallow water,muddy shoal, commonly found in eg. an estuary) **contained in**(seeking…in) DEE(the estuary in Cheshire where the river Dee flows into the sea).  Another nice surface.