Here's Clap Machine in action in Realband, you can just use the Metronome > Write to Track
move/copy notes to create the beat, stagger notes randomly up or down to use slightly different sound samples.
To move all events of the one note click the piano note to select all (Red) hold the Shift key and grab the middle of the note to move up or down, grab the left side of the note to move left or right, grab the right side to lengthen/shorten note/s.
Save Track as UserTrack Drums (have "Drums" in the name so BB don't transpose it)
"Clap Machine is a freeware VST/AU plugin for Windows and Mac OS X, based on the natural hand clap samples from our free
Hands Make Sounds sample library. The purpose of Clap Machine is to provide a quick and easy way to add natural sounding claps to your music."