Musical game (5)
I believe the answer is:
'musical' is the definition.
(Benny Andersson and Bjrn Ulvaeus musical)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for chess that I've seen before include "Musical - board game" , "Pure-skill board game" , "Board game of 13, 16 and 21" , "activity aimed at downfall of a king" , "Benny Andersson and Bjorn Ulvaeus musical" .)