Put a new roof on when one got back (9)
I believe the answer is:
recovered
'one got back' is the definition.
(I've seen this before)
'put a new roof on when' is the wordplay.
I cannot quite see how this works, but
'on' could be 'over' (I've seen this in other clues) and 'over' is found in the answer.
'when' could be 'e' (I've seen this in other clues) and 'e' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for recovered that I've seen before include "Found again - recuperated" , "Did rally" , "Well now!" , "Took back" , "Got better" .)