Possible Clues:

• Kind of spray for allergies
• Describes the nose passageway
• Twang type
• Like some cold symptoms
• A bit of passion as a lady shows such a tone
• Kind of congestion
• On the face of it one knows the sound of this
• 'Knows how to be like this, by the sound of it (5)'
• Like 12-down's voice
• Alan's unusual manner of speaking?