Crossword Genius

Unit of work (3)

Ross

I believe the answer is:

erg

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unit of work</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>

(Other definitions for erg that I've seen before include "Unit of measurement of work" , "Energy expended" , "shifting sand" , "Unit of work or energy" , "Unit of work; dunes area" .)

I've seen this clue in The Irish Times, The Wall Street Journal, the Sydney Morning Herald, the LA Times, the King Feature Syndicate, The New York Times, The Washington Post Sunday, the Penny Press and The Guardian.
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