Range of particular faculty so heartbreaking? (7)
I believe the answer is:
earshot
'range of particular faculty' is the definition.
(the range of hearing)
I don't understand the remainder of the clue.
(Other definitions for earshot that I've seen before include "Within which we hear" , "Hearing distance" , "Range for hearing" , "Extent of being heard" , "Hot ears (anag.)" .)