Brief downpour (6)
I believe the answer is:
shower
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">brief downpour</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I have seen 'Short downpour ' mean 'shower' so perhaps 'downpour' could also mean 'shower'; 'brief' asks for an abbreviation)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for shower that I've seen before include "Brief spell of precipitation" , "Brief rainfall" , "Plumbing fixture and brief period of precipitation" , "Lavish" , "One demonstrating" .)