Possible Clues:

• House-sitter has to look after sizeable bird
• Member of the House of Lords
• Provided sword passes between both shoulders, one's noble
• Noble lord initially provided with sword, right?
• House of Lords appointee
• One's ennobled, if taking sword in both hands
• Take out file and look for one with a non-hereditary entitlement
• Long-term detainee gets discharge and he lords it
• One put into a house with bishops? That could be a severe sentence, look!
• Noble whose title cannot be inherited