Possible Clues:

• Order by one's church for a task not done
• Nothing is left out with the single one on the religious work there
• What's been left out round the embassy? (8)
• Something left out or neglected
• Neglect old religious settlement
• Act of leaving out
• Skipping
• Neglect brings to naught travellers' task
• Lack of oxygen on space expedition?
• Old girl, one getting on, missing out