Repair resort, half damaged (7)
I believe the answer is:
restore
'repair' is the definition.
(synonyms)
'resort half damaged' is the wordplay.
'half' suggests halving the letters.
'damaged' becomes 'tore'.
'resort' cut in half is 'res'.
'res'+'tore'='RESTORE'
(Other definitions for restore that I've seen before include "Build up again" , "Repair, put back" , "Repair, renovate" , "Bring back to original state" , "Give or put back" .)