As this is a numerical puzzle, the usual wording isn't really appropriate. If any number-loving Forum member has a version that is more pertinent, works better, feel free to pass it on to me!
Help with the clues may be sought here, and gentle help towards the theme may be sought here. Aim to give a nudge in the right direction, don't give away anything that would spoil the puzzle for others. Anything that could be seen as a spoiler is likely to be removed. The theme itself should not be revealed.
The Listener is a unique puzzle and should be treated with respect.