Hooded jacket (5)
'hooded jacket' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for anorak that I've seen before include "Raincoat" , "Jacket; nerd (colloq.)" , "Mikado's son (G&S)" , "Nerdy type" , "Jacket for obsessives?" .)
(Other definitions for parka that I've seen before include "Hooded waterproof coat" , "jacket for cold weather" , "outdoor clothing" , "warm gear" , "cover plus hood attachment" .)