Crossword Genius

GoPro, e.g. (3)

Ross

I believe the answer is:

cam

(Other definitions for cam that I've seen before include "Bump on a shaft for pushing another shaft" , "Tributary of the Ouse" , "Irregular projection" , "It controls the motion of engine cylinder valves" , "academic stream" .)

I've seen this clue in the King Feature Syndicate, the Jonesin' and the USA Today.
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