It's played during a witches' Sabbath (5)
I believe the answer is:
chess
'it's played' is the definition.
I can't judge whether this definition defines the answer.
'during a witches' sabbath' is the wordplay.
'during' says the answer is hidden in the clue.
'CHESS' is hidden within 'witches sabbath'.
Can you help me to learn more?
(Other definitions for chess that I've seen before include "Pieces moved in this" , "In which two bishops will participate" , "Benny Andersson and Bjorn Ulvaeus musical" , "that has over thirty men on board" , "Game involving mates" .)