The rebirth of the River Thames

a noun meaning a large sea animal that eats fish and lives mainly in cold parts of the world (2)

a noun meaning a layer of a substance that forms at the bottom of a liquid (4)

a phrasal verb meaning making water, dust, or sand to move around (4)

a noun meaning waste substances, especially waste from people’s bodies, removed from houses and other buildings by a system of large underground pipes (6)

a verb meaning to move an object from one place to another (6)

a verb meaning to allow liquid or gas to leave a place, especially when this has harmful effects (8)

a verb meaning to provide a place or container with a new supply of something (8)

a noun meaning a lack of success in doing something (8)

a verb meaning become less (9)

an adjective meaning not changed by chemical substances (12)