Goal in final (3)
I believe the answer is:
end
I believe this is a double definition.
'goal' is the first definition.
(both can mean a purpose)
'final' is the second definition.
(synonyms)
'in' acts as a link.
(Other definitions for end that I've seen before include "Fine" , "Novel by Graham Greene" , "Objective or conclusion" , "Cesation, conclusion" , "'Finish, cease (3)'" .)