Look after a grievance, say? (5)

I believe the answer is:

nurse

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'look after' is the definition.
(thesaurus)

I don't understand how the remainder of the clue works.

(Other definitions for nurse that I've seen before include "Tend - care for" , "Cherish" , "drink slowly" , "Qualified carer" , "care worker" .)

I've seen this clue in the Evening Standard.

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