Aridity (7)
I believe the answer is:
dryness
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">aridity</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for dryness that I've seen before include "Lack of moisture" , "Freedom from moisture" , "producing thirst" , "Characteristic of some wines" , "Matter-of-fact quality (of humour)" .)