In every detail (2,3,6)
I believe the answer is:
to the letter
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">in every 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 to the letter that I've seen before include "how should tenant's rent be paid?" , "Following every detail" , "Exact in every detail" , "From the tenant, presumably" , "correct in every detail" .)