First letter (7)
I believe the answer is:
initial
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">first letter</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 initial that I've seen before include "Name's first letter" , "Sign" , "First home, corgi, ultimately, wagging tail" , "Relating to the beginning" , "Introductory" .)