Demonstrate clearly (6)
I believe the answer is:
evince
'demonstrate clearly' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for evince that I've seen before include "Indicate or display, say a feeling" , "Prove beyond doubt" , "Show or display clearly" , "Manifest, show" , "Show or reveal, say interest" .)