Possible Clues:

• Someone invited judged on the radio
• Might have divined, by the sound of it, that one was not a club member
• Visitor to your home
• Person entertained
• Person invited to your party
• You may provide a bed for one
• A wartime player was described as this by his host club
• One on a list
• Kind of room
• Speculated loudly whether one had an invitation