Respiratory condition (6)
I believe the answer is:
asthma
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">respiratory condition</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for asthma that I've seen before include "Breathing complaint" , "inspiring trouble" , "Distressing ailment affecting breathing" , "Shortage of breath" , "Distressing breathing condition" .)