Good score from Antwerp arrived (3)
I believe the answer is:
par
'good score' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for par that I've seen before include "Black music" , "Regular score" , "Normal number of strokes for a hole at golf" , "Norm" , "Rap to get even" .)