Copied record, single, inside (6)
I believe the answer is:
cloned
'copied' is the definition.
(cloning is a kind of copying)
'record single inside' is the wordplay.
'record' becomes 'cd' (I've seen this in other clues).
'single' becomes 'lone' ('lone' can be a synonym of 'single').
'inside' indicates putting letters inside.
'cd' enclosing 'lone' is 'CLONED'.
(Other definitions for cloned that I've seen before include "Made an exact copy of" , "eg Like Dolly the sheep" , "Made an identical copy of a living organism" , "Propagated like Dolly the sheep" , "with many copies" .)