Length of a bridge (4)
I believe the answer is:
span
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">length of a bridge</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 span that I've seen before include "Stretch < fresh" , "Width of pans" , "Interval in terms of time" , "Width of wings" , "Bridge - spick and ___" .)