Two artists stand back to back on hill, first is closer to Penn & Teller (8)
I believe the answer is:
narrator
But I can't explain it at all!
(Other definitions for narrator that I've seen before include "The one telling the story - arrant or what?" , "Teller - or rat ran (anag)" , "taleteller" , "Story teller" , "Someone who tells a story" .)