Aim to throw a log (4)
I believe the answer is:
goal
'aim' is the definition.
(I've seen this in another clue)
'throw a log' is the wordplay.
'throw' is an anagram indicator.
'a'+'log'='alog'
'alog' with letters rearranged gives 'GOAL'.
'to' is the link.
(Other definitions for goal that I've seen before include "Aim - two posts, a crossbar and a net" , "Aim (at football)" , "End" , "Soccer achievement" , "Objective, purpose" .)