A 91-run partnership for the fifth wicket between Derek de Boorder and Neil Broom, both of whom made half-centuries, was the only resistance Otago offered, and that was quickly curtailed by McClenaghan.
His third spell saw the 25-year-old left-armer claim the last five Otago wickets to finish with 6-87 from 21 overs on the bowler-friendly surface, putting his side well in control at the innings break.
Unfortunately for McClenaghan, Auckland's batsmen failed to back up his feats with the ball. Tim McIntosh's dismissal for a duck at the end of the second over was a sign of things to come, with Neil Wagner and Warren McSkimming both taking a brace to haul the Volts back into the contest.
In Gisborne, Northern Districts made a mediocre start to defending their lead at the top of the table, but Hamish Marshall at least gave the Knights some respectability with 82. Brother James chipped in with 43, which saw him become the province's leading first class run-scorer, while New Zealand wicketkeeper BJ Watling finished the day unbeaten on 42.
The best of the Stags' bowlers was Zimbabwean Kyle Jarvis, who signed for Central at the conclusion of his nation's recent tour of New Zealand and celebrated today with 3-46.
Bottom-placed Canterbury provided the pick of the batting efforts in Rangiora, with dumped Black Caps wicketkeeper Reece Young set for a nervous night after ending the day on 98 not out. He capitalised on a solid foundation built by George Worker (64) and Peter Fulton (55) to give the Wizards the edge on points after the opening day.
For Wellington, 21-year-old Harry Boam took 4-48, his first four-wicket haul in first class cricket, while fellow youngster Scott Kuggeleijn chipped in with a pair of wickets.