Derogatory (5)
I believe the answer is:
snide
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">derogatory</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for snide that I've seen before include "Sneering, supercilious" , "Sneering in a sly way - dines out on it" , "Derogatory, sneering" , "Maliciously mocking" , "Supercilious, malicious" .)