Colour affected rate in tyre (7)
I believe the answer is:
retread
'tyre' is the definition.
(retread is a kind of tyre)
'colour affected rate in' is the wordplay.
'colour' becomes 'red' (red is a kind of colour).
'affected' indicates an anagram.
'in' means one lot of letters goes inside another.
'rate' is an anagram of 'trea'.
'red' enclosing 'trea' is 'RETREAD'.
(Other definitions for retread that I've seen before include "recycled material" , "One much improved in rubber" , "Remoulded tyre" , "tyre that was worn" , "New surface" .)