Leave Croatian port (5)
I believe the answer is:
split
I believe this is a double definition.
'leave' is the first definition.
(I've seen this before)
'croatian port' is the second definition.
(I've seen this before)
(Other definitions for split that I've seen before include "Cleavage" , "Separate or cut with a tool" , "Left" , "Cleave or divide" , "Chop or divide" .)