Wealthier (6)
I believe the answer is:
richer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wealthier</span>' is the definition.<br/ ><span class="explanation-format__explanation">('rich' can be similar in meaning to 'wealthy')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for richer that I've seen before include "More well-off" , "More affluent" , "Wealthier" , "Having more wealth" , "More wealthy" .)