Clorr is one of the five mogwai spawned from Gizmo in the first film, Gremlins. According to the novelization, he was accidentally killed by Lynn Peltzer.
Novelization[]
Clorr was just a typical mogwai that spawned from Gizmo. Clorr died after being exposed to sunlight when Lynn Peltzer forgot about him on the porch and locked him outside. His death led to Stripe's discovery that bright light was harmful to him and the other mogwai.