Hooded waterproof jacket (6)
I believe the answer is:
anorak
'hooded waterproof jacket' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for anorak that I've seen before include "Nerdy type" , "Dull person" , "Zipped jacket with hood attached" , "Jacket; nerd (colloq.)" , "Jacket for outdoors" .)