What’s coming up on and off from one exec rocks TV (6)

I believe the answer is:

screen

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'tv' is the definition.
(thesaurus)

I can't explain the rest of the clue.

(Other definitions for screen that I've seen before include "Examine methodically" , "Light partition providing shelter, concealment etc" , "Surface on which pictures are projected in cinemas" , "Divider to select for suitability." , "Blind - hide from view" .)

I've seen this clue in The Telegraph.

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