Sailor does need to change addresses (6)
I believe the answer is:
abodes
'addresses' is the definition.
(abode is a kind of address)
'sailor does need to change' is the wordplay.
'sailor' becomes 'ab' (abbreviation for able seaman).
'need to change' indicates an anagram (I've seen 'needs to change' mean this).
'does' with letters rearranged gives 'odes'.
'ab'+'odes'='ABODES'
(Other definitions for abodes that I've seen before include "Places of residence" , "Dwelling-places" , "Dwellings" , "Houses, homes" , "Dwelling places" .)