I just published a Spey Casting Youtube video about the drift or circle up. The circle up is the part of the cast that gets you from the end of the sweep to the beginning of the forward cast.
According to the Flyfishers International website, the definition of the Drift is:
Drift – Rod rotation and/or hand translation during the pause in
the direction of the current cast.
Also if we are talking about the Drift we need to talk about Creep:
Creep – rod rotation during the pause in the direction of the next cast.