Conclusions to motorway repairs (5)
I believe the answer is:
mends
'repairs' is the definition.
('mend' can be a synonym of 'repair')
'conclusions to motorway' is the wordplay.
'conclusions' becomes 'ends' (end is a kind of conclusion).
'to' means one lot of letters go next to another (I've seen this in other clues).
'motorway' becomes 'm'.
'ends' after 'm' is 'MENDS'.
(Other definitions for mends that I've seen before include "Repairs, darns" , "Fixes" .)