Something to wear starting with N could be a necktie or necklace.
Necktie
does it has to be clothes or can it be jewlery? cause it could be a necklace. but i dont know. (:
Something you wear that begins with a is an ascot tie.
netball
a netted hat
Dungarees
Overcoat
Hat!
Adidas
Garment
Anorak