Set sail, turn craft east heading for Okinawa (2,2,3)
I believe the answer is:
go to sea
'set sail' is the definition.
(I've seen this before)
'turn craft east heading for okinawa' is the wordplay.
'turn' becomes 'go' (a person's move in a board game).
'craft' indicates an anagram (letters must be crafted into a new form).
'heading for' indicates taking the first letters.
The first letter of 'okinawa' is 'o'.
'east'+'o'='easto'
'easto' anagrammed gives 'tosea'.
'go'+'tosea'='GO TO SEA'
(Other definitions for go to sea that I've seen before include "Leave working on the land" , "set sail" , "live off the land" , "Become a sailor" .)