Answer: glowworm

AnswerCrossword Clue
GLOWWORMBioluminescent larva
GLOWWORMMills Brothers tune
GLOWWORMMills Brothers song subject
GLOWWORMFirefly
GLOWWORMFirefly's young
GLOWWORMFirefly larva
glowwormA soft-bodied beetle with luminescent organs in the abdomen, esp. the larvalike wingless female, which emits light to attract the flying male
glowworma luminous insect