Desire to get rid of … to get rid of piano (4)

I believe the answer is:

urge

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'desire' is the definition.
(I know that urge is a type of desire)

I cannot understand how the rest of the clue works.

(Other definitions for urge that I've seen before include "Longing" , "Press to take action" , "Encourage, press" , "'Exhort, press (4)'" , "Encourage to proceed, drive onward" .)

I've seen this clue in The Times.

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