Hide directions to island (7)
I believe the answer is:
secrete
'hide' is the definition.
(I know this)
'directions to island' is the wordplay.
'directions' becomes 'se' (I've seen this in other clues).
'to island' becomes 'crete' (Greek island).
'se'+'crete'='SECRETE'
(Other definitions for secrete that I've seen before include "Hold and send out substance into the body as gland does" , "Hide - discharge" , "Hide away" , "Place out of sight, hide" , "Hide; as gland does" .)