Answer
The answer to the question of which instrument Keith Flint played in the band Flint is "none." Flint was the charismatic frontman and vocalist for the English electronic music group the Prodigy, and he was not known for playing any musical instruments within the band. Flint's primary role in the Prodigy was as the lead singer, and his energetic and captivating performances were a crucial aspect of the band's success.