Large bottle often encased in wickerwork (8)
I believe the answer is:
demijohn
'large bottle often encased in wickerwork' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for demijohn that I've seen before include "Large bulbous bottle (with wicker cover?)" , "Large bottle in a wicker basket" , "Large bottle with a short narrow neck" , "Large, small-handled bottle" , "Large bottle for wine storage" .)