Filter out stress (6)

I believe the answer is:

strain

I believe this is a double definition.

'filter out' is the first definition.
(synonyms)

'stress' is the second definition.
(synonyms)

(Other definitions for strain that I've seen before include "making a great demand on the emotions?" , "Overtax; tension" , "Muscle injury - tension" , "Tension and exertion" , "Muscle injury, put liquid through sieve" .)

I've seen this clue in The Irish Times.

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