___ , fade, dissolve (video editing technique) (6)

I believe the answer is:

ripple

(Other definitions for ripple that I've seen before include "Slight disturbance on surface of lake" , "Small wave or surface disturbance" , "Small wave on a liquid's surface" , "Type of ice cream with coloured syrup" , "Slight surface wave" .)

I've seen this clue in The Guardian.

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