Asthma sufferer’s device (7)

I believe the answer is:
inhaler
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">asthma sufferer's device</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 inhaler that I've seen before include "Medical device" , "chest expander?" , "Drug dispenser" , "It helps asthmatic" , "Breather" .)