One refusing a measure of hose (6)
I believe the answer is:
denier
'one refusing' is the definition.
(someone denying or refusing something)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for denier that I've seen before include "Units of weight in silks, nylon and other yarns" , "Unit of weight of nylon, etc" , "One refuses to acknowledge" , "One refusing to admit" , "One unwilling to accept" .)