(I will admit, there is a part of me that wants Tara to toss both kids in the minivan and drive until she hits Jefferson.)
That phone call Clay took was from Romeo, which we can infer from the fact that Clay's meeting with Romeo in a demo yard right now. Romeo is none too pleased to inform Clay, "Otto killed a nurse last night and RICO's dead." Clay swears, and it's small consolation when Romeo flips open his federal ID to tell him, "You were right. We need the guns for bigger game and the coke to pay for it." Since killing RICO signals that Jax wants to end the deal, Luis would like to make sure Clay works with them to ensure that the deal remains safe. Romeo: "We're going to take him out, and anyone who stands in the way." Luis: "We suggest you make your move back to the head of the table before your charter evaporates." That hits Clay, but not how these two think it does. Clay tells them, "You know, getting rid of RICO ain't about guns or drugs. It's about getting rid of RICO. Charter's gotten used to all this cartel cash. Jax knows that. Let me speak to him. Leave him be." I find Clay's mingled feelings toward Jax to be utterly fascinating -- the resentment over the passing of the torch, but the lingering paternal love he can't compartmentalize.