Addictive thing to wear? (5)
I believe the answer is:
habit
'to wear?' is the definition.
(habit is a kind of wear)
'addictive thing' is the wordplay.
'addictive' becomes 'hab' (I can't justify this - if you can you should give a lot more credence to this answer).
'thing' becomes 'it'.
'hab'+'it'='HABIT'
Can you help me to learn more?
(Other definitions for habit that I've seen before include "Custom - costume" , "Propensity" , "It's second nature" , "bent" , "Custom, nun's wear" .)