You cant kill something that is guaranteed to hit you. Its dumb. Its casual. You literaly have no choice but to wait until you are capable of killing it through leveling.
I've actually killed the deathclaws at quarry junction in new vegas simplistically, i had to be a sneaky b*stard and a bunch of retries but it can be done...
The 50 cal. sniper rifle with the silencer attached to it. once you kill the male then you can mow the rest down easy.
The mother deathclaw tho was fast as shyt i had to kill that bytch from the top of a goddamn mountain...