Aid worn by a non-swimmer (7)
I believe the answer is:
armband
(Other definitions for armband that I've seen before include "It may identify" , "Swimming aid" , "Identification worn on sleeve" , "support for member" , "part of the uniform" .)
I believe the answer is:
armband
(Other definitions for armband that I've seen before include "It may identify" , "Swimming aid" , "Identification worn on sleeve" , "support for member" , "part of the uniform" .)