Crossword Genius

It transpires in waste disposal (5)

Ross

I believe the answer is:

sweat

I'm a little stuck... Click here to teach me more about this clue!

'disposal' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'it transpires in waste' is the wordplay.
'waste' anagrams to 'SWEAT'.
But, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for sweat that I've seen before include "Male perspiration?" , "Soldier" , "Salty fluid secreted by glands" , "Perspire" , "Trouble in Australia" .)

I've seen this clue in the Evening Standard.
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