So Nunb allows you to remove stress if an enemy ship is in range 1.
After you gain a stress token, if there is an enemy ship in your V at range 0-1, you may remove that stress token.
and Pattern analyzer says:
While you fully execute a red maneuver, before the Check Difficulty step, you may perform 1 action.
so could you do a red move, do the PA action, clear that stress, then do another action? I kind of feel like that's not what the card was meant to do, but Rules Lawyers and FFG's bang up job on technical writing means it could go either way.