The Irishman had shared the overnight lead at Golf de Saint-Nom-La-Bretèche but nobody could keep pace with him in round two as he carded a 65 to finish at three under and win by 11 shots.
Military veteran Clougherty has overcome incredible adversity to make it to the pinnacle of the all abilities game after being medically discharged from the Royal Military Police in 2013.
While he has had post-traumatic stress disorder (PTSD) since 2003, Clougherty was not actually diagnosed until six years later after suffering a double leg fracture while playing semi-professional football in the Irish League with Moyola.
The injury left him with Complex Regional Pain Syndrome in his right leg and foot, affecting his nervous system.
Unbeknown to him, he was told at his consultation he had been suffering from a second underlying case of PTSD since 2005 when he was treated for testicular cancer.
“That’s the monkey off my back,” he said following his victory. “With my PTSD I really suffer with anxiety and confidence and that today has just proved that I can play and I’m capable of playing at a high level if I just set my mind to it and make the game simple.”
Clougherty made three birdies on the front nine but also a bogey and a triple as he turned in 37 before finding some incredible form on the way in.
He birdied the tenth, 11th and 13th before eagling the 14th and birdieing the next.
A birdie-birdie finish then saw him go 11 shots better than round one as he secured a maiden G4D Tour title and sealed a place at the season-ending G4D Tour @ Rolex Grand Final.
“It’s just amazing, absolutely amazing,” he added. “I didn’t have a clue, especially after yesterday. I thought it’s going to be tight because there’s a lot of good players and I just went out and had the round of my life.
“It was night and day [from round one]. I got my putting going, had two chip-ins. We went and worked on something yesterday afternoon on the range just to get my driver going, tweaked the shape, and we went out today and driver was just absolutely firing.”
England’s Adam Dalton was the nearest challenger after a 75, finishing three shots clear of Italian Davide Fasci, Slovenian Marjan Gavez, Norwegian Ellen Katherine Larsen and Czech Filip Rataj.