Answer: birdlime

AnswerCrossword Clue
BIRDLIMESubstance to catch small birds.
birdlimeto catch or capture, as with birdlime
birdlimesticky material prepared from holly, mistletoe, or other plants, and smeared on twigs to catch small birds that light on it
birdlimeto smear with birdlime
birdlimeto trap small birds