Rick will do everything possible (6)

I believe the answer is:

strain

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'rick' is the definition.
(both can mean a physical pain)

I can't explain the remainder of the clue.

(Other definitions for strain that I've seen before include "Noted" , "Sieve; breed" , "Stress or make taut" , "Family - tension" , "Trains under stress and pressure" .)

I've seen this clue in the Evening Standard.

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