Crossword Genius

Praise a chap not being in uniform (4)

Ross

I believe the answer is:

laud

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'praise' is the definition.
(lauding is a kind of praising)

I cannot understand how the rest of the clue works.

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(Other definitions for laud that I've seen before include "Praise - celebrate" , "Give praise to" , "homage" , "Name of archbishop; praise" , "Praise acclaim" .)

I've seen this clue in the Evening Standard.
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