Company cars I fixed up for the island (7)
I believe the answer is:
corsica
'the island' is the definition.
(Corsica is an example)
'company cars i fixed up' is the wordplay.
'company' becomes 'co' (abbreviation).
'fixed up' indicates an anagram (the order of letters must be fixed).
'cars'+'i'='carsi'
'carsi' is an anagram of 'rsica'.
'co'+'rsica'='CORSICA'
'for' is the link.
(Other definitions for corsica that I've seen before include "Island of W Italy, capital Ajaccio" , "Island N. of Sardinia" , "French island in Med" , "Mediterranean island, chief city Ajaccio" , "Napoleon's island birthplace" .)