Clothing it's normal to take off clothes line (7)
I believe the answer is:
apparel
'clothing' is the definition.
('apparel' can be a synonym of 'clothing')
'normal to take off clothes line' is the wordplay.
'normal' becomes 'par'.
'to take off' becomes 'ape' (I've seen this before).
'clothes' means one lot of letters goes inside another.
'line' becomes 'l'.
'par' going into 'ape' is 'appare'.
'appare'+'l'='APPAREL'
'it's' is the link.
(Other definitions for apparel that I've seen before include "Clothing, things to wear" , "kit" , "Fancy gear" , "Attire" , "Formal word for clothing" .)