Lieutenant Colonel gave Sandra Hughes her first Grade One winner since taking over the licence of her father Dessie who died a fortnight ago.
The horse, ridden by Bryan Cooper, returned to a warm welcome after claiming a dramatic Hatton's Grace Hurdle at Fairyhouse.
"It was dad's plan to stay over hurdles with him this year," Hughes said.
In the Drinmore Chase, her favourite The Tullow Tank was fourth as Valseur Lido sealed a Willie Mullins treble.
Mullins also scored with Kalkir and Nichols Canyon, but revealed his exciting mare Annie Power will be off for eight to 10 weeks after missing the Hatton's Grace with a stress fracture.
Annie Power was runner-up to More Of That in the World Hurdle at the 2014 Cheltenham Festival and now faces a race to be fit in time for next year's meeting where she is evens favourite to win the Mares' Hurdle.
Lieutenant Colonel (7-2) triumphed at Fairyhouse after the Mullins-trained favourite Zaidpour brought down King Of The Picts at a flight around the halfway stage and hampered Jetson.
Sandra Hughes, the sister of champion jockey Richard, had gained her first success as a trainer 24 hours earlier with Sub Lieutenant.