The 33-year-old joined the A-League club on a 'multi-year' contract, after leaving Queens Park Rangers at the end of the 2021-22 season.
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Austin has made the headlines whilst plying his trade down under, not only complaining about Australian TV, but claiming Hobnobs are better than TimTams.
The ex-QPR and Southampton striker has since taken to Twitter to confirm he will leave the Australian club due to 'family reasons'.
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In a post, he said: "The management, the lads & the fans have been fantastic, & still supported me even during my deliberations to head home. I've loved the A-League and hope it continues to grow. Family first, football second."
During his time with Brisbane Roar, Austin netted twice in six appearances for the side.
When being drawn on the subject this week, Chris Fong, the Roar chairman would not give answers on Austin's future, but did claim the club would target a striker in January.
"We are focusing on strengthening our attacking line-up in the January window," he said.
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"If Charlie is a part of that I'm not sure but I do understand discussions are in progress as there are broader implications at stake, especially non-club related.
"Charlie is a stand-up person, and wherever we land it will be in the best interests for the club and Charlie."
It comes as a huge blow for the Australian outfit who were hopeful of keeping hold of the experienced forward.
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Brisbane are currently 10th in the league table, three points behind Sydney FC in the playoffs.