I have a beatstep with an iPad and a minibrute, i want to clock the minibrute to the beatstep but not to have the pitch information of the beatstep to the minibrute.
Have you tried using different MIDI Channels? Like setting the MiniBrute to receive on Channel 2 while the beatstep is sending on Channel 1.
MIDI Clock is MIDI Channel agnostic, so every instrument in a MIDI chain will receive it.
MIDI Notes are MIDI Channel aware, so each instrument will only receive those sent for a specific MIDI Channel.
If the iPad is set to receive on Channel 1, the MiniBrute on Channel 2 and BeatStep is sending (notes/CCs) on Channel 1, the MiniBrute won't "see" them, only the iPad (app) will.