Shelter repaired late on (4-2)
I believe the answer is:
lean-to
'shelter' is the definition.
(I know that lean-to is a type of shelter)
'repaired late on' is the wordplay.
'repaired' indicates anagramming the letters.
'late'+'on'='lateon'
'lateon' anagrammed gives 'LEAN-TO'.
(Other definitions for lean-to that I've seen before include "Small building resting on side of larger one" , "Outhouse" , "Structure whose roof has only one slope" , "Hut" , "Simple building" .)