Some Essene masters have things that eliminate waste (6)

I believe the answer is:

enemas

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'that eliminate waste' is the definition.
I can't tell whether this definition defines the answer.

'some essene masters have' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'ENEMAS' is hidden within 'essene masters have'.

'things' acts as a link.

Can you help me to learn more?

(Other definitions for enemas that I've seen before include "See man (anag) - medical procedures" , "Bowel evacuation producers" .)

I've seen this clue in The Irish Times.

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