Copy turrets design - no time for holes (9)
I believe the answer is:
apertures
'for holes' is the definition.
(aperture is a kind of hole)
'copy turrets design no time' is the wordplay.
I cannot really understand how this works, but
'copy' could be 'ape' (ape can mean to copy or imitate) and 'ape' is found in the answer.
'time' could be 't' (abbreviation) and 't' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for apertures that I've seen is " 'Holes, openings (9)'".)