Banshee Attacked Dinosaur - 7x7

Cryptic Mini #000000117: 

"Banshee Attacked Dinosaur"

difficulty level:
😶‍🌫️

why do I always write these after midnight, when all my joke juice has been depleted? the answer: [write punchline here]

thanks again to tookey for helping testsolve, and for writing the def for 8A.
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Created by Bob Weisz using the online cross word maker from Amuse Labs