Thanks Borate and Nationalsolo. Now I know how to easily show the original/parent clip although sometimes I have multiple edited clips from the same parent so this doesn't distinguish between them.
To clarify my problem let me explain what I am doing now. Having taken 60 or so clips with my drone of a mountain village I go though and edit the best parts with the result that I have up to a hundred edited clips. I need to identify those which are similiar (eg flying over the village church) so I can position them next to each other and easily compare them.
My method at the moment is to preview and write out a list of the edited clips (identified by duration) with a brief description of each. I then know that the ones with the church are those of length 8.241, 6.496, 7.847, 5.275, 11,386 etc. Then I have to find these clips among the hundred and move them so they are side by side and easily compared. Of course if I re-edit a clip i have to keep a note of the new duration and it is easy to lose track. This is a tedious process and I am sure there should be an easier way. It would help if I could label my edited clips (eg ch1, ch2, ch3 etc) or or at least just give them simple numbers. I will follow Borate's advice and submit a suggestion but for now I am struggling every time I go on a photoshoot.