The most common and most likely answer to this crossword clue is the 8 letter word NARRATOR
I've seen this crossword clue in The Times
N
A
R
R
A
T
O
R
More clues leading to the result NARRATOR
- Storyteller from Scottish island going north to river
- Storyteller from Scottish island returning to centre of Kinross
- Scottish island returned to king whose role is telling
- . Two artists stand back to back on hill, first is closer to Penn & Teller
- Decay on Scottish island upset commentator
- The 3 R’s? No ta, a poor reflection on reporter
- One relates to breaking rule island brought back
- Decay on Scottish isle to the west, one can tell
- One describes Scottish island facing decline in recession
- Some tommyrot arranged to hold up storyteller
Buddy explains!

The straight part
We know that "whose role is telling" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case whose role is telling = narrator.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does NARRATOR mean?
NARRATOR noun- One who narrates or tells stories.
- The person or the "voice" whose viewpoint is used in telling a story.
- The person providing the voice-over in a documentary.