1: 4-down Arias hit high note in some of the lungs (3,3)

3: Roman date and time that is in Latin (2,3)

5: Tippecanoe is home to a nut (5)

6: Freshen the atmosphere (3)

7: Ban professional writer (9)

8: Mediterranean leaves unfashionable coins? (3)

9: The lowest point in a dire section (5)

11: Casts off shacks (5)

12: Sound of river crossing (3)

1: Height is equal to three-fifths of the first one (3)

2: Judges playing conkers? (7)

3: Simpletons at home with no money (9)

4: Short time for the Irish (5)

6: Song about death for lover of Theseus (7)

7: Robin Goodfellow's ice hockey requisites (5)

10: Three kernels of copper-yellow grain (3)