Minor setback (6)
I believe the answer is:
hiccup
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">minor setback</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 hiccup that I've seen before include "Snag" , "Reflex spasm of the diaphragm" , "Sudden throat sound or minor mishap" , "Involuntary glottal closure" , "Glitch" .)