Omitted, as a syllable (6)
I believe the answer is:
elided
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">omitted as a syllable</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for elided that I've seen before include "cut off" , "Left out vowels" , "Missed end" , "Dropped (e.g. vowel)" .)