Show two words as one, in short (6)

I believe the answer is:

sitcom

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'show' is the definition.
(I know that sitcom is a type of comedic television series)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for sitcom that I've seen before include "TV show intended to be humorous" , "Amusing TV series (abbr.)" , "Type of comedy show" , "Episodical TV programme" , "Light-hearted TV series" .)

I've seen this clue in the Evening Standard.

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