Drain ear after first of piercings (8)
I believe the answer is:
plughole
'drain' is the definition.
(I've seen this before)
'ear after first of piercings' is the wordplay.
'ear' becomes 'lughole' (I've seen this before).
'after' means one lot of letters go next to another.
'first of piercings' becomes 'p' (1st letter of 'piercings').
'lughole' after 'p' is 'PLUGHOLE'.
(Other definitions for plughole that I've seen before include "Bath drain" , "outlet" , "It can be stopped" , "What's designed for draining" .)