Small-minded (5)
I believe the answer is:
petty
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small-minded</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for petty that I've seen before include "Insignificant or trivial" , "Insignificant and smallminded" , "Unimportant" , "Small-time" , "Inferior" .)