Related Clues:

• Person using self-contained underwater breathing apparatus
• Vicar's a kind of card -- turning up as loon?
• Underwater explorer drives madly round island
• Grebe maybe wanting day on water, heading off
• Underwater swimmer drives excitedly across Caribbean island
• Underwater worker
• *One working at a low level
• Navy specialist
• Snorkel user
• Bird that plunges
• Grebe or Loon
• Summer Olympics competitor
• I'm going under? I have to have doctor around!
• Awkward drives around country -- one moves through water
• Reef explorer