Possible Clues:

• Night guard's problem
• Doldrums
• Sound of singing in church, but one bore with it
• Boredom, mental weariness
• Monotony of new diet Mothers' Union rejected
• Boredom or dullness
• Almost due time to break monotony
• One trusts it's not so boring in church as this is, by the sound of it
• Lack of variety
• Bore this tie twisted through the mud