I take JKD and think of it as that trapping is one route to clinching--not a preferred route, just the one you might take in certain cases. This is a PFS school (i.e., Paul Vunak's organization) where getting control of the head and launhcing a HKE elbow attack is a preferred roue, and so it may reflect his approach more than anything else...or my limited understanding.
But, to me trapping is obstruction removal (as we say in Modern Arnis), whereas clinching is control, or a battle for same.
But, to me trapping is obstruction removal (as we say in Modern Arnis), whereas clinching is control, or a battle for same.