Try hard (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">try hard</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 strive that I've seen before include "Vie, contend" , "Vie; compete" , "Work hard - compete" , "Rivets (anag)" , "Make great efforts" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">try hard</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 endeavour that I've seen before include "famous ship" , "Expenditure of effort" , "Try hard; enterprise" , "Industrious effort" , "The first handle inspector has" .)