Musical game (5)

I believe the answer is:

chess

I'm a little stuck... Click here to teach me more about this clue!

'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" .)

I've seen this clue in The Daily Express, The Independent and The Mirror.

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