Assiduous (8)
I believe the answer is:
diligent
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">assiduous</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for diligent that I've seen before include "Putting care and effort into work" , "Assiduous" , "Painstaking - I tingled (anag)" , "Steady and hard-working" , "Taking trouble" .)