Druids, buzzing after Kevin Holgsrove fired them to a 1-0 home victory over Bangor City four days earlier, looked set to snatch a hard-earned point after Gerard McGuigan saved Craig Hughes’ penalty.
But young substitute Jamie Horwood had other ideas as he settled the contest with a cool finish eight minutes from time.
Geraint Lewis and Ricky Evans had earlier hit the woodwork for Druids, who make the short trip to Airbus UK Broughton on Monday (2.30pm).
A bad week for Lex XI got worse on Saturday as they lost 2-1 at Cymru Alliance strugglers Penrhyncoch.
After Carl Andrews was sent off, Gareth Roberts reduced the deficit for Lex, who have been deducted three points for their part in a brawl at Flint Town United and who have been kicked out of the League Cup for fielding an ineligible player.
Lex host Welsh National League Premier Division pacesetters Llangollen Town in the NEWFA Challenge Cup semi-finals on Saturday.
Gresford Athletic, who recorded a superb 1-0 win at Ruthin Town on Saturday thanks to a Darren Jones goal, are in league action at home to second-placed Llangefni Town (both 2.30pm).
