Stud setting (4)
'stud setting' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lobe that I've seen before include "part of brain" , "Lower part of the ear" , "Part of ear or leaf" , "Bottom part of ear" , "Division of the lungs or brain" .)
(Other definitions for earlobe that I've seen before include "Listener's part" , "Fleshy part of hearing organ" , "It depends on the listener" , "Soft part of a facial organ" , "place to hang jewelry" .)