The opposite of to cut out of (3)
I believe the answer is:
fro
'the opposite of to' is the definition.
(I've seen this in another clue)
'cut out of' is the wordplay.
'cut' means to remove the last letter.
'out of' becomes 'from' (I've seen this before).
'from' with its final letter taken off is 'FRO'.
(Other definitions for fro that I've seen before include "Opposite direction to to" , "To and - means back and forth" .)