Immortal piper (3)
I believe the answer is:
pan
This clue is a double definition.
'immortal' is the first definition.
(Pan is an example)
'piper' is the second definition.
(I've seen this in another clue)
(Other definitions for pan that I've seen before include "Greek god of flocks and heards" , "Pot" , "Greek nature god" , "piece in the kitchen" , "Find fault with - container" .)