Possible Clues:

• Bar request
• The Nora Batty is someone else!
• Anonymous person having one for the road?
• Sound of one hymn or of a different one
• Perhaps the sound of a hymn or something different
• Sounds like one hymn or a different one
• A different hymn, perhaps, by the sound of it (7)
• Someone else on a roundabout before the ride starts
• A different operation initiated in part of plant
• Veronica not here? Look for someone else