Finish off goal (3)
I believe the answer is:
end
I believe this clue is a double definition.
'finish off' is the first definition.
(thesaurus)
'goal' is the second definition.
('end' can be a synonym of 'goal')
(Other definitions for end that I've seen before include "Novel by Graham Greene" , "border?" , "dying > department" , "Termination" , "Intention" .)