Possible Clues:

• Short call received by husband, old Germanic type
• Old migrant making call on hospital without leave
• Hun opponent
• Fourth-century invader of Rome
• Try to put in call to husband - he had a smashing time in Rome
• Old European trip hard to inject with energy
• Alaric, eg, who conquered Rome
• Call hospital about to move old German
• Go to hospital carrying game 'Invader'
• Call includes green light for hospital produced by Roman invader