Hughes positioned the Stephen Kilroy-trained Caesareal in the one-one before the seven-year-old ground out a 1.5 metre win down the straight at the price of $31. It was just the fifth victory in 114 starts for Caesareal.

Hughes then caused an upset over odds-on favourite Private Sector with the Clayton Harmey-trained Stephens Spirit ($9.50) in the $10,200 Menangle country series heat.

He handed up the early lead to Private Sector and put Stephens Spirit behind the Roy Roots jnr-trained last-start winner.

Hughes pulled Stephens Spirit out from the pegs approaching the home turn and the four-year-old wore down Private Sector to win by a half-head on the line.

Hughes' treble came in the sixth when he overcame early trouble on the Harmey-trained Platinum Revolution.

The race was delayed after Hughes had a gear malfunction on the odds-on favourite but they recovered for the restart.

Hughes took the 2018 Pink Bonnet winner to the lead with a sustained sprint from the outside gate and she was never threatened, cruising to an 8.6m victory in a 1:58:0 mile rate for the 2030m.

Hughes grabbed his fourth, and Harmey's third, of the night when he took Bobsled Boy ($6) to victory in the last, a Seymour Evolution Series heat.

The success follows a record-breaking meeting at Tamworth for Hughes in September. At 17, he became the youngest driver to have five winners at one meeting.

He sits atop the concession drivers' premiership in NSW with 19 wins.