Possible Clues:

• The sound of 2 down may be hollow in the bone (6)
• Spirited insect up your nose but not in Ulster
• Six feet of this with spirit to make it sin with us
• Biological cavity
• Gets up your nose in Ireland, by the sound of it
• By the sound of it, one knows where to get the sound of 1 across
• Bodily cavity as in the nose
• Bodily cavity or chamber
• Sounds like the county up one's nose for a drink with the insect
• Bone cavity