Crossword Genius

Board given nothing to replace a cheap bottle (5)

Ross

I believe the answer is:

plonk

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'board' is the definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps there's a link between them I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for plonk that I've seen before include "Wine - put down with a thud" , "cheap drink" , "Put down - cheap wine" , "Cheap red or white" , "Drop" .)

I've seen this clue in The Times.
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