Creating Groove Clips

Sorry for the dumb question, but how do you create a Groove Clip?  I went to the help section online entitled "Creating and editing Groove Clips" and it gives me all kinds of information about editing (setting number of beats, changing loop construction view, setting tempo, etc.)  but nothing about creating.
 
I am trying to take two audio clips with different tempos and have them match.  I know I can do this with Audio Snap but I only know how to set tempo for the entire project using Tempo View and if I do that, I can't correct tempos in more than one track if the clips are in the same position, time wise, in the project, and in different tracks.
 
I would love to have the tempo set in the individual clips so I could make clips that are in same time frame but in different tracks have different tempos.