John William Chardon, 71, has been accused of killing his 34-year-old wife Novy, who went missing in February 2013 amid a divorce dispute.

Chardon feared their divorce would make his wife's lover an "instant millionaire", his Brisbane Supreme Court trial heard on Monday.

A man Chardon allegedly met via an Asian dating website, Marshall Bari Aguilor, has claimed that during a meeting in The Philippines in early 2012, he was asked to kill Ms Chardon.

Chardon allegedly asked Mr Aguilor to carry out the murder for $US10,000 and, if not, find someone who could.

"He told me that he needed three hitmen," Mr Aguilor told the jury, through an interpreter.

Asked under cross-examination about why Chardon said he needed three, Mr Aguilor replied, "so it's not very hard to hide the body".

Chardon has pleaded not guilty to his wife's murder more than six years after she was last seen.

Mr Aguilor has testified Chardon wanted to lure his wife to the Philippines, where she was to be killed.

They also discussed "finding a cliff" and hiding her body in a cave where her remains would eventually be found "so the children find out", Mr Aguilor said.

When he asked why he wanted her dead, Chardon said it was because divorce assets were commonly split in half in Australia.

"He said to me, 'and she's got a boyfriend and that boyfriend will be an instant millionaire'," he said.

The trial also heard that Chardon responded "any publicity's good publicity" when told by a former employee of media coverage of early investigations into Ms Chardon's disappearance.

"They're (police) really trying and they've got nothing," he said to Franca Canzoneri in a phone conversation, played to the jury.

"They're trying f****** hard to find something. There's nothing to f****** find."

The trial continues.

Australian Associated Press