Related Clues:

• Going round the bend, old man's a danger in the main
• Killer-whale
• One often spouting, sending elderly relative round the bend
• Whale of a weight, Manx cat carried
• Skilful swimmer's weight — with special effort — reduced
• Good synchronised swimmer with sign of infection put on weight
• Heavy breather's racket disturbing theatre cat
• Lightweight Manx cat's a killer at sea
• The killer whale
• Another name for the killer whale
• Whale's mass and power starts to upset sailors
• Dolphin's a lightweight, gets half-pushed aside
• Heavy breather in the main?
• Sea creature — lightweight animal lacking tail?
• Whale beginning to swim up, something oily coming to surface