Doctor in Leith organised digital protection (7)
I believe the answer is:
thimble
'digital protection' is the definition.
(I've seen this before)
'doctor in leith organised' is the wordplay.
'doctor' becomes 'MB' (Bachelor of Medicine, Medicinae Baccalaureus).
'in' is an insertion indicator.
'organised' indicates an anagram.
'leith' is an anagram of 'thile'.
'mb' put inside 'thile' is 'THIMBLE'.
(Other definitions for thimble that I've seen before include "Finger protection when sewing" , "Cap used for protection when sewing" , "Sewing tool" , "Cover for finger when sewing" , "Needlewoman's aid" .)