Objectives the sailor achieves (7)
I believe the answer is:
targets
'objectives' is the definition.
(I know this)
'sailor achieves' is the wordplay.
'sailor' becomes 'tar' (slang term for a sailor).
'achieves' becomes 'gets' (I've seen this in another clue).
'tar'+'gets'='TARGETS'
'the' is the link.
(Other definitions for targets that I've seen before include "Butts" , "objectives of firing people" , "Goals" , "Reference points to shoot at" , "Aim points" .)