Certifier of deeds (6)
I believe the answer is:
notary
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">certifier of deeds</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 notary that I've seen before include "Certifier of deeds etc." , "Official working on legal documents" , "Legal functionary" , "Public official, usually a solicitor" , "Person who may certify legal documents" .)