I would think a fused/relay circuit would be fine using the clutch ECU sig.
But you may want to check the whole electric pump system as the belt drive pump also uses the same ECU sig to operate the
SOV that controls the air control valve between the eng and pump [ a parallel circuit].
There is also a check valve involved , so you may want to see if these are incorporated into the electric pump or still have to be retained from the Belt system.