SINGAPORE, Oct 22 (Reuters) - The Reserve Bank of Australia stepped in to defend its yield-target on Friday and offered to buy A$1 billion ($750 million) of its targeted government bond maturing in April 2024. The yield on the April 2024 bond fell 5.6 basis points (bps) to 0.14%, according to Refinitiv data, leaving it still four bps higher than the central bank’s 0.1% target. ($1 = 1.3378 Australian dollars) (Reporting by Tom Westbrook. Editing by Shri Navaratnam)