Canberra - Someone will be making a Super Rugby comeback five seasons after leaving the competition, but it will not be Wallabies great Stephen Larkham making a surprise appearance in the coming weeks.

The Brumbies are on the verge of signing former Waratahs point-scoring ace Peter Hewat to add experience to their backline for the rest of the season.

Hewat is understood to have agreed to join the Brumbies after Christian Lealiifano suffered a broken ankle last weekend.

However, the move is subject to a clearance from Hewat's Japanese club Suntory, approval from the ARU and whether the Brumbies can secure insurance for his stint in Canberra.

Hewat is 34 and, despite playing just three seasons of Super Rugby, he is the second-highest point scorer in Waratahs history. He was also the leading point scorer in his debut season in 2005. He left Australia in 2007 to play in Europe before joining former Brumbies and Wallabies coach Eddie Jones at Suntory.

Brumbies coach Jake White said on Wednesday he was considering luring Larkham out of retirement to fill the hole left by injured duo Lealiifano and Matt Toomua.

But Larkham backed Zack Holmes and Robbie Coleman to handle play-making duties and said he was not contemplating a comeback.

Hewat began his career as a wing and fullback, but developed into a flyhalf in Japan.

White is confident in his youngsters, but wanted to add experience and depth to his roster with the Brumbies in a position to make the finals.

Hewat would add that, and his goal-kicking will also help ease the pain of losing Lealiifano who was the team's first-choice kicker.