Copy, simulate (7)
I believe the answer is:
imitate
I believe this clue is a double definition.
'copy' is the first definition.
(I know that imitate is a more specific form of copy)
'simulate' is the second definition.
(I know that simulate can be written as imitate)
(Other definitions for imitate that I've seen before include "Copy or mimic" , "Follow suit" , "Fake" , "Parrot" , "Copy someone" .)