Thank you all for your input... Sorry I haven't checked/replied sooner -- the truth is timi's ear has gotten significantly better since my post; the vein and the ear itself is normal-colored already, and there is just a tiny/harmless-looking "mole" where the "clot" was. But I know I shouldn't be complacent with the "harmless-looking mole", as it could dislodge and cause serious problems, as LillyBear/Amanda said. And I do appreciate & value your opinions on checking with the vet -- it's just that the local vets are not very rabbit-savvy yet, hence my post -- but I will do make a visit to be sure.
Thanks again BinkyBunny, gravehearted, poopy and Lillybear/Amanda!