Crossword Genius

Cries noisily over losing large pad (4)

Ross

I believe the answer is:

swab

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'pad' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

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(Other definitions for swab that I've seen before include "Hospital cleaner" , "Cotton wool mop" , "Mop up - uncouth fellow" , "Cleaning implement" , "Cloth for cleaning wounds" .)

I've seen this clue in The Times.
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