Wear and tear taking train (7)
I believe the answer is:
raiment
'wear' is the definition.
(raiment is a kind of wear)
'tear taking train' is the wordplay.
'tear' becomes 'rent' (rent is a kind of tear).
'taking' is an insertion indicator.
'train' becomes 'aim' ('aim' can be a synonym of 'train').
'rent' enclosing 'aim' is 'RAIMENT'.
'and' acts as a link.
(Other definitions for raiment that I've seen before include "Garb" , "Tire man (anag.)" , "investment" , "dress?" , "Attire" .)