Possible Clues:

• Unusual like copper having rest day?
• Not keeping time musically? That's unusual
• Unorthodox like a second-rate drummer?
• Eccentric out of sorts, exhausted
• Unconventional females worn out by love
• Wacky
• Wacky, like pen-pushing boys in blue?
• Start to thump eccentric
• Unusual not to be rhythmic
• Odd, Bobby not on his round?