Requiring great effort (9)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">requiring great effort</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for herculean that I've seen before include "Powerful" , "Old Labour" , "Monumental (task)" , "Enormously demanding (task)" , "Showing great strength" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">requiring great effort</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for strenuous that I've seen before include "Vigorous" , "Physically demanding" , "requiring much effort" , "Needing much effort" , "Very active" .)
(Other definitions for demanding that I've seen before include "Requiring much effort" , "Requesting" , "Stringent" , "Exigent" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">requiring great effort</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for arduous that I've seen before include "Demanding great effort" , "Difficult, laborious" , "Extremely taxing" , "Daunting: strenuous" , "Requiring much effort" .)