Cowboys enforcer Josh McGuire is set to leave the club as part of a three-player swap deal involving two halfbacks.
A three-way player swap is being considered that may ease the problems of three injury-hit clubs.
McGuire has ruffled some feathers at the Cowboys and the club is unlikely to stand in his way of a move south.
He has worked with Dragons coach Anthony Griffin at the Broncos and the pair have a good relationship.
Clune couldn’t break into the Dragons’ side until the back-to-form Ben Hunt broke his leg last week.
Hunt’s injury could delay the three-way swap as Clune has stepped up in his absence, selected at halfback alongside Corey Norman.
The Knights are injury ravaged in the halves and would welcome Clifford as soon as possible.
Some dominoes still have to fall into place, but there is work being done behind the scenes to make the three-way move happen in coming weeks.
For a daily dose of the best of the breaking news and exclusive content from Wide World of Sports, subscribe to our newsletter by clicking here!