Squib (3)
I believe the answer is:
dud
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">squib</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I have seen 'Damp squib' mean 'dud' so perhaps 'squib' could also mean 'dud')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for dud that I've seen before include "Failing to work properly" , "Just a palindromic flop" , "Something useless - a palindrome" , "Not functioning" , "Forged" .)