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Not smooth, frumpily dressed Irish men kicked out? (5)

Ross

I believe the answer is:

lumpy

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'not smooth' is the definition.
(I've seen this before)

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

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(Other definitions for lumpy that I've seen before include "Clotted; knobbly" , "Covered in swellings" , "Choppy" , "As badly mixed custard" , "Uneven in texture" .)

I've seen this clue in The Irish Times.
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