Obsessive sort of habit? (6)

I believe the answer is:

anorak

This clue is a double definition.

'obsessive' is the first definition.
(anorak can mean an obsessive person)

'sort of habit?' is the second definition.
(sort of item of clothing or habit)

(Other definitions for anorak that I've seen before include "Jacket; nerd (colloq.)" , "geek" , "Garment; studious person" , "Weather-resistant fabric" , "Jacket for obsessives?" .)

I've seen this clue in The Telegraph.

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