Gene is out of grievances with ministers (6)

I believe the answer is:

vicars

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'ministers' is the definition.
(I've seen this before)

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

(Other definitions for vicars that I've seen before include "Members of clergy in charge of churches" , "clergymen" , "Ministers" , "those taking tarts to party" .)

I've seen this clue in the Irish Times.

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