(a) kaçmak, tüymek, sıvışmak.
We were warned to clear off before the floods came. (b) kaybolmak, dağılmak, yokolmak.
When the smoke cleared away, we saw that the house was in ruins. (c)
clear away: kaldırmak, temizlemek, derleyip toplamak.
I'll just clear the plates away, then I'll have a rest.