Ear-piercing site (4)
I believe the answer is:
lobe
I believe this clue is a double definition.
'ear' is the first definition.
(thesaurus)
'piercing site' is the second definition.
(I've seen this in another clue)
(Other definitions for lobe that I've seen before include "flap" , "Appendage to ear" , "Rounded part (of organ)" , "could be site of a 24 [STUD]" , "Base of ear" .)