15a Scowled, once; became cloudy (7) G?O???D
3d Italian cathedral (5) ?U???
Thought this was TURIN but the I would be 5th letter of clue above and couldn't find a word.
20d Suffolk town, once a prosperous centre of the wool trade(8) ?A?L?I?H
Thought this was RAYLEIGH but Google tells me that's in Essex