Character from Sparta participating in some games (5)
I believe the answer is:
omega
'character from sparta' is the definition.
'omega' can be an answer for 'character' (omega is a kind of character). I am not certain of the 'from sparta' bit.
'participating in some games' is the wordplay.
'participating in' indicates the answer is hidden within the clue.
'OMEGA' can be found hidden inside 'some games'.
Can you help me to learn more?
(Other definitions for omega that I've seen before include "End of sequence" , "Last (Gk. letter)" , "Greek character symbolizing resistance" , "long letter" , "character in Greek literature?" .)