Effort originally put into re-engineering of old CDs is made public (9)
I believe the answer is:
disclosed
'is made public' is the definition.
(I've seen this in another clue)
'effort originally put into re-engineering of old cds' is the wordplay.
I cannot quite understand how this works, but
'put' could be 'lose' (losing is a kind of putting) and 'lose' is found in the answer.
an anagram of 'cds' is 'scd' which is located in the remaining letters.
The remaining letters 'di' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for disclosed that I've seen before include "Revealed" , "Made known" .)