Posh were dangerous on the attack at times but a watertight Blues back line kept the hosts at bay.
A second consecutive clean sheet was made all the more impressive thanks to goals from Nikola Zigic and Chris Burke, resulting in the visitors claiming the spoils.
Whilst the visitors could have added extra gloss to the scoreline, Clark was just pleased with the way his side achieved the three points in a chilly East Anglia.
The Blues boss told bcfc.com: “We kept another clean sheet, that’s two on the bounce now, which has proved difficult for us this season. It was a professional performance and the lads stuck to the game plan and I think in the end we had opportunities to make the scoreline bigger.”
Clark continued: “Obviously we had the goal chalked off for offside. Wes Thomas probably thought he should have scored with a header. There were other incidents and situations where we could have made more of the opportunities we created, but you’ve got to be delighted with a 2-0 win away from home.”
Such is the confidence Clark has in a rejuvenated Blues team; the 40-year-old believes the quality at his disposal is good enough to survive on just a handful of chances, especially on the road.
He added: “I think it’s the basis of any successful team (a solid defence). It doesn’t matter how you want to play. If you’re not conceding goals and you know you’ve got match winners at the other end of the field like we have, you just need one or two opportunities. Away from home when you’ll not be creating bundles of chances, you’ll be hitting teams on the break and I think it’s given us a solid base.
“We’ve had one defeat in eight and I think in all honesty the scoreline looked like it was a thumping at home to Watford, but as I said at the time; the only difference in that game was them being clinical and us making poor decisions. In the middle part of the pitch we were very even with Watford. There wasn’t any rash decisions after that, we just calmed ourselves down and we’ve got back on track.”