Land at home east of boat at sea (6)
I believe the answer is:
'land' is the definition.
'home east of boat at sea' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'east of' says to put letters next to each other (some letters go to the right of others).
'at sea' indicates an anagram.
'boat' with letters rearranged gives 'obta'.
'in' put after 'obta' is 'OBTAIN'.
'at' is the link.
(Other definitions for obtain that I've seen before include "Acquire, secure", "Get - secure", "Gain possession of", "Get one's hands on", "Get, procure".)