Odd bits of data about very long show (6)
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I believe the answer is:
depict
'show' is the definition.
(to depict is to show or portray)
'odd bits of data about very long' is the wordplay.
'odd bits of' means one should take alternating letters.
'about' is an insertion indicator.
'very long' becomes 'epic' (I've seen this before).
The alternate letters of 'data' are 'dt'.
'dt' enclosing 'epic' is 'DEPICT'.
(Other definitions for depict that I've seen before include "Make portrait" , "Draw, describe" , "Sketch or describe" , "Paint" , "Delineate" .)