Related Clues:
- Knocks softly
- Military lights-out tune
- Doesn't pound hard
- Is of profit, helps
- 'Ah, what - the sceptred race!/ Ah, what the form divine!' (W.S. Landor)
- Strikes lightly; eavesdropping devices
- Lightly strikes penalty?
- Thread cutters' strikes
- Jack to some extent despatched bugs
- A weeper's the thing when it serves the purpose
- Four-note piece
- Army bugler's tune
- Strikes lightly
- Camp lullaby
- Shortly, what central heating will reveal knocks?