Possible Clues:

• Informally, a retired member of the armed services working at the Tower of London
• Does one work for queen? Worker to exploit queen
• Tower official
• Insectivorous bird biting female warder at Tower
• Tower of London figure
• Soldier's beer drinking exploit with Elizabeth the first
• Who will protect this carnivore?
• Warder, female, feeding bird
• Tower officer is no vegetarian
• Steak lover, e.g