Bennett fired a three under 68 third round on Saturday to leapfrog Spanish rookie Carolina Chacarra (74) at the top of the Hulencourt Women's Open leaderboard at 10 under.
The par 5 ninth hole at Hulencourt Golf Club provided a crucial three-shot swing, handing the Aussie a two-shot advantage as Chacarra carded a double-bogey with Bennett making birdie.
It may well come down to a final group duel between Bennett and second-placed Chacarra as third-placed Aditi Ashok and Diksha Dagar of India sit three shots further back.
Chacarra is teeing up in her only second LET event of the season and carded the course record 65 (-7) on Friday. She is the brother of Eugenio, a multiple-time winner on the DP World Tour.
Bennett is chasing a second win on the LET tour after claiming the Australian Women's Classic on home soil back in March. She is currently third on the LET Order of Merit - the highest position of anyone in the field this week.
"Yeah it was a pretty solid day," Bennett said.
"I actually didn't really know what the scoreboard was doing so it's good to know I'm now two shots clear.
"It was pretty breezy out there..If you miss the fairway and you're in that long grass you'r not finding it.
"I was plotting my way around the course and this course sets up well for my game ..I'll just keep doing what I'm doing tomorrow."
Chacarra was proud of her round.
"It was definitely harder out there," she said. "I hit it as close as I did yesterday but the poutts didn't drop.
Of the third-placed duo, Ashok (70) is a five-time winner on the LET with Dagar (71) has won two events on the tour.
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