Crossword Genius

Practice boxing (4)

Ross

I believe the answer is:

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">practice boxing</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>

(Other definitions for spar that I've seen before include "Box; various minerals" , "What boxers do" , "Sticks" , "bar" , "Box for practice" .)

I've seen this clue in the Newsday, The New York Times, the LA Times, The Star Tribune, the Evening Standard, The Mirror, the Universal, the USA Today and the Penny Press.
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