Waterless (4)
I believe the answer is:
arid
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">waterless</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for arid that I've seen before include "Excessively dry" , "Wadi may be this" , "Parched, waterless" , "Dry and parched, as with regions" , "Without water" .)