One generally speaks of playing "the claves"; the singular form is seldom used.
From Latin clāvis (“key”).
"claves." YourDictionary, n.d. Web. 21 June 2018. <http://www.yourdictionary.com/claves>.
claves. (n.d.). Retrieved June 21st, 2018, from http://www.yourdictionary.com/claves
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