On long tours I put a new coat on (7)
I believe the answer is:
repaint
'put a new coat on' is the definition.
(I've seen this in another clue)
'on long tours i' is the wordplay.
'on' becomes 're' (regarding).
'long' becomes 'pant' (I've seen this before).
'tours' is an insertion indicator (to tour can mean to go around).
'pant' going around 'i' is 'paint'.
're'+'paint'='REPAINT'
(Other definitions for repaint that I've seen before include "put on new coat" , "To provide fresh cover" , "put on another coat" .)