Alexander Graham Bell, by birth (4)
I believe the answer is:
scot
'alexander graham bell by birth' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for scot that I've seen before include "Native of Inverness" , "Someone from north of the border?" , "Glaswegian perhaps" , "Northern member of UK" , "UK northerner" .)