Returned to stock to be brought back to tip-top condition? (8)
I believe the answer is:
restored
'returned' is the definition.
(restoring is a kind of returning)
'stock to be brought back to tip-top condition?' is the wordplay.
I cannot quite see how this works, but
'stock' could be 'store' (synonyms) and 'store' is present in the answer.
The remaining letters 'red' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'to' is the link.
Can you help me to learn more?
(Other definitions for restored that I've seen before include "Brought back to original condition" , "Put back" , "Given back" , "Reconstructed" , "Returned to original condition or place" .)