Makes sure that it’s returned undamaged (4)
I believe the answer is:
sees
'makes sure' is the definition.
('see' can be a synonym of 'make sure')
'it's returned undamaged' is the wordplay.
'it's' becomes 'es' ('e' can mean 'electronic' which is similar to 'IT').
'returned' is a reversal indicator.
'undamaged' becomes 'es' (I can't explain this - if you can you should give a lot more credence to this answer).
'es' reversed gives 'se'.
'se'+'es'='SEES'
'that' is the link.
Can you help me to learn more?
(Other definitions for sees that I've seen before include "Gets sight of" , "Observes or perceives" , "Clocks" , "Understands" , "Notices" .)