### Clue: Stacks of chalk required by dressmakers? (7)
### Answer: NEEDLES 
 ### Explanation: Definition: Stacks of chalk,required by dressmakers
  Double defn:  1st: With the definitie article and an upper-case initial, the 3 stacks of chalk off the Isle of Wight; and 2nd: Pointed implements required by dressmakers for their work.