Strung out (5)
I believe the answer is:
tense
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">strung out</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tense that I've seen before include "Strained by time in grammar" , "In a nervous state" , "Verb form indicating time" , "Suffering from strain" , "Worried" .)