I want the C4 to be CONSUMMATE = "very" (as in "the very gall!"). The wordplay would have to be CON = "former communist" (already a stretch but okay, being a communist used to land you in jail in the U.S. in the fifties), SE = "state's on vacation" (vacating, i.e. emptying, "state"), and then…
UMMAT = "stable genius"?? Not seeing it.