"Spell" is obvious. "Effect" is also fairly consistently defined, though still possibly open to interpretion. However, "condition" is very much an unknown quantity. Lacking any other context to go on, the scope of what what this maneuver is capable of working on seems to be almost entirely up to what the DM wishes to allow it to work on.
When I run games, I limit the maneuver's scope solely to what is present on the
Condition Summary (aside from obvious things, like "Dead", and certain other ones of my choosing, like "Pinned" and "Prone"). Because,
in my opinion, that is what the authors intended.