Round 1 symbols for minutes or feet (6) things made of several parts (10) $\sum_{n=1}^{\infty}(\frac{1}{2})^n$ (3) Round 2 Italian snow, reversed (4) supporting pillars (7) at that time (4) strange (3) Round 3 occasional (3) how one powers a single skull (4) after that (4) flat and smooth (4) Ro...