It's mean to the players (5)
I believe the answer is:
mezzo
'it's mean' is the definition.
(thesaurus)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for mezzo that I've seen before include "Singing voice between contralto and soprano" , "A citrus cross" , "Female singing voice" , "Female singer" .)