Grubby (5)
I believe the answer is:
dirty
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">grubby</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for dirty that I've seen before include "Salacious" , "Soiled" , "Muddy" , "Mucky" , "Unclean or indecent" .)