Separate, break into parts (5)
I believe the answer is:
split
I believe this is a double definition.
'separate' is the first definition.
(I know that separate can be written as split)
'break into parts' is the second definition.
(I've seen this before)
(Other definitions for split that I've seen before include "See 9" , "Fork" , "Break; fissure" , "Divide (into parts)" , "Chop or divide" .)