Ventilating (6)
I believe the answer is:
airing
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ventilating</span>' is the definition.<br/ ><span class="explanation-format__explanation">('air' can be a synonym of 'ventilate')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for airing that I've seen before include "Exposure" , "Broadcast" , "Ventilating, say a grievance" , "Ventilation" , "Publicity" .)