Strangely lithe doctor included digital protection (7)
I believe the answer is:
thimble
'digital protection' is the definition.
(I've seen this before)
'strangely lithe doctor included' is the wordplay.
'strangely' is an anagram indicator.
'doctor' becomes 'mb' (Bachelor of Medicine, Medicinae Baccalaureus).
'included' means one lot of letters goes inside another.
'lithe' with letters rearranged gives 'thile'.
'thile' enclosing 'mb' is 'THIMBLE'.
(Other definitions for thimble that I've seen before include "Cover for finger when sewing" , "Finger-guard" , "sewer cover?" , "Cap to protect the finger while sewing" , "Belt him, carrying finger protector" .)