In golf, a very short distance, principally excused (5)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

A charade of G (‘golf’, NATO alphabet) plus I MM ( 1 millimetre, ‘a very short distance’) plus E (‘principally E xcused’), with an &lit definition for a putt so short that the golfer is excused from executing it.