Dtgk

[Horatio]

If answers to following fits, then I am finished. Exhausted all other avenues.

1d Having a speed that is or about the speed of sound in air at sea level (9)

28d Material that has a permanent electric charge polarisation

30d solemn promises to somebody to do something or act in a certai way.

29a Demonstrating lively attentiveness , especially shown by a sentry

Many thanks

[soliloquy]

28d ELECTRET

30d VOWS

29a ON THE QUI

[soliloquy]

29a ON THE QUI VIVE

[Horatio]

Thanks soliloquy.......just 1d to get

[Bordeaux]

1d transonic

[Bluebell]

Transonic for 1d

[Horatio]

Thanks BLUEBELL & BORDEAUX....have a glass of the latter on me!