Related Clues:

• Subtract middle of week for one paying rent
• River swallows ship with ecstasy produced by lodger perhaps
• Resident officer takes prize to worker
• Apartment dweller, e.g
• Letter with a limited amount of space
• Flat figure
• Attacker at sea possibly repelled school pupil
• Renter of room
• Happen to be taken short, and long to be a resident
• One sleeping at school
• Tenant without duplicate keys
• American lodger engineers to make fast buck?
• Not so much ease, say, for this tenant
• Schoolchild perhaps, one that's getting on plane
• School liver-in