Not rich (4)
I believe the answer is:
poor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not rich</span>' is the definition.<br/ ><span class="explanation-format__explanation">('poor' is the opposite to 'rich')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for poor that I've seen before include "Lacking means; paltry" , "Pants" , "Needy or unsatisfactory" , "Badly off - inferior in quality" , "Penniless" .)