Attentive to detail (11)
I believe the answer is:
punctilious
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">attentive to detail</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 punctilious that I've seen before include "Showing great attention to detail" , "Paying attention to detail" , "Precise in formalities of etiquette" , "Attentive to detail" .)