There are plenty of kinds of smart, of course. Depending which kind you mean, I'd consider Dian Belmont. Clever, creative, wise.
But women in the DCU generally don't get slotted in the supergenius roles. How about Veronica Cale? Or the Amazon who invented the Purple Ray -- was that Paula, or am I thinking of someone else?
And was that the same Paula as Diana's old nemesis, Paula Von Gunther? I *think* I recall her turning over a new leaf, but there have been so many versions of continuity I don't know unless someone tells me outright.