Close, aim (3)
I believe the answer is:
end
I believe this clue is a double definition.
'close' is the first definition.
(close can mean to end or finish)
'aim' is the second definition.
(both can mean a goal or purpose)
(Other definitions for end that I've seen before include "'Finish, cease (3)'" , "border?" , "Final stage" , "Terminate in den" , "Aim; terminate" .)