Aim at (4)
I believe the answer is:
seek
'aim at' is the definition.
(to seek is to aim at or try to get)
This is all the clue.
(Other definitions for seek that I've seen before include "Ask for (permission)" , "Hunt, look for" , "Attempt to find; ask for" , "'. . . . and ye shall find'" , "Try to locate or reach" .)