Shot completely left missing target (4)
I believe the answer is:
goal
'target' is the definition.
(thesaurus)
'shot completely left missing' is the wordplay.
'shot' becomes 'go' (I've seen this in other clues**).
'completely' becomes 'all' ('all' can be a synonym of 'completely').
'left' becomes 'l' (common abbreviation).
'missing' is a deletion indicator.
'all' with 'l' taken away is 'al'.
'go'+'al'='GOAL'
(Other definitions for goal that I've seen before include "Target (best not one's own!)" , "Aim (at football)" , "Objective or score" , "Soccer achievement" , "Aim or purpose" .)