Kept in check by writer knocking back local plonk

I believe the answer is:

pent-up

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(Other definitions for pent-up that I've seen before include "Dammed or repressed" , "Confined like feelings or water behind dam" , "Repressed, emotions say" , "Confined like dam water or suppressed anger" , "Russian city" .)

I've seen this clue in the Irish Times.

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