Possible Clues:

• They're worn of late
• They're always worn of late
• Can be on one only if one is late
• Worn only of late
• P all over these all over one that's late
• Must have a 20 across to get them on at last
• Makes it hard and grave round about, so they do
• Right clothing for a grave occasion
• 'By the sound of it, berries with them on (9)'
• Winding-sheets