Others distressed about a faculty's range (7)
I believe the answer is:
earshot
'faculty's range' is the definition.
(the range of one's hearing, a faculty)
'others distressed about a' is the wordplay.
'distressed' is an anagram indicator.
'about' indicates putting letters inside.
'others' anagrammed gives 'ershot'.
'ershot' enclosing 'a' is 'EARSHOT'.
(Other definitions for earshot that I've seen before include "Distance within which a sound can be heard" , "in audible range" , "Extent of being heard" , "catching distance?" , "To share (anag)" .)