Crossword Genius

Waste product containing salt (5)

Ross

I believe the answer is:

sweat

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

'salt' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.

'waste product' is the wordplay.
'waste' anagrams to 'SWEAT'.
Though, I am unsure how this is indicated.

'containing' acts as a link.

Can you help me to learn more?

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

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