Way to follow sailor overseas (6)
I believe the answer is:
abroad
'overseas' is the definition.
('abroad' can be a synonym of 'overseas')
'way to follow sailor' is the wordplay.
'way' becomes 'road' (road is a kind of way**).
'to follow' says to put letters next to each other.
'sailor' becomes 'ab' (abbreviation for able seaman).
'road' put after 'ab' is 'ABROAD'.
(Other definitions for abroad that I've seen before include "At large - overseas" , "Away in another country" , "out of UK?" , "in Paris, perhaps" , "Out of doors - in foreign parts" .)