Shrewdness (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">shrewdness</span>' is the definition.<br/ ><span class="explanation-format__explanation">(acumen can mean shrewdness or good judgment)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for acumen that I've seen before include "Shrewdness, intelligence in business" , "Shrewdness, good for business" , "Business sense" , "Gumption" , "ability to make good judgements" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">shrewdness</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for astuteness that I've seen before include "Penetration" , "Canny" , "Shrewdness" , "perception" , "Sagacity" .)