Possible Clues:

• A lot by the sound of a broken oar to get round
• Bellowing, hollering
• Bellowing in the 1920s, perhaps?
• The Lion's part, nothing but this (MND)
• Like the 1920's
• Might one put one's oar in in such a very sound way?
• Making cry (like a lion)
• Row in band proves riotous
• Making a loud sound, like a lion
• Do a - trade, - forties