Sloping letters (7)
I believe the answer is:
italics
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sloping letters</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 italics that I've seen before include "Letters slanting upward to the right" , "Typeface with letters slanting to the right" , "Sloping typeface" , "They emphasise" , "Sloping font" .)