Single on Columbia January 1969 by Brisbane band formed 1964, originally called The Tropics. The single was recorded in Melbourne, produced by notable New Zealand expat producer and A&R man at HMV, Howard Gable.
The Avengers competed in the national final of the Hoadley's Battle of the Sounds in 1969.
The 'Listen Listen' page at Brisbane Music Graveyard has streaming & downloadable tracks and information on the band.
After The Merry-Go-Round, Rhodes went solo, playing all the instruments on a self-titled album that he recorded in a studio he built at his parents' house. Emitt Rhodes (1970), reminiscent of The Beatles (especially McCartney), was well received and is regarded as a major work of the 1970s. Other albums followed in the first half of the 70s before he went into producing and engineering, although he has released further material in recent decades.
An iconic cult figure in American pop music – Mark Denning, All Music
Recommended reading: The excellent official Emitt Rhodes site at emittrhodesmusic.net.
B-side on Pittsburgh label Kyra by band from Youngstown, Ohio.
Reference: Notes at 45cat, linked above.