TV picture, broadly speaking (8)

I believe the answer is:

panorama

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'tv picture' is the definition.
'panorama' can be an answer for 'picture' (panorama is a kind of picture). I am not sure about the 'tv' bit.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for panorama that I've seen before include "Current affairs programme" , "Total view (of subject)" , "Broad view (of BBC TV?)" , "long-running programme" , "Distant view of a wide area" .)

I've seen this clue in the Evening Standard.

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