Related Clues:

• Used to be to Bob, by the sound of it
• Bob and Bob of old made for nil
• This object was never near to being worth much
• Old 21-shilling coin
• This used to be to bob, by the sound of it
• It's the country to be twenty-one, Bob
• Old four-pence coin
• Old money and pig
• __ pig: experiment subject
• See 10
• Twenty-one shillings for fowl ...
• One of John's is 3rd of 6
• Land of 21 6s
• ...of such a remote object comes to 21
• 2 6s for keeping student at home