Following proper procedure (4)
I believe the answer is:
duly
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">following proper procedure</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 duly that I've seen before include "As a matter of course" , "Suitably" , "Following proper procedure" , "In proper form, time" , "In a proper manner" .)