Piece of furniture with a computer on top? (4)

I believe the answer is:

desk

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'piece of furniture' is the definition.
(desk is a kind of piece of furniture)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for desk that I've seen before include "Table for writing, reading etc" , "Writing-table" , "Writer's workbench" , "School furniture item" , "Flat surface for doing paper work" .)

I've seen this clue in the Evening Standard.

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