There really isn't much to clarify here. The administration is just using the world "clarify" because it sounds better to say "We want to clarify the laws on torture." rather then the honest "We want to remove the laws on torture."
This adiminstration has fought this issue every step of the way. First claiming there was no torture and there wasn't anything to talk about. And then the prison scandel in Iraq shattered that argument. Then they resorted to saying it was all legal because Bush's signing statments over ruled what Congress passed. When it became clear that this argument would not hold up in court, they move to using secret prisons outside the US. Only when it became clear that the secret prisons where not secret any more did they make this move.
Redefining what torture is under US law is simply the next step in this game.
Jay