Cryptic crossword clue
Rolling Stones fan initially occupying tiny British island 8

The most common and most likely answer to this crossword clue is the 8 letter word ROCKFALL

I've seen this crossword clue in Financial Times
R
O
C
K
F
A
L
L

Buddy explains!

The straight part
We know that "Rolling Stones" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rolling stones = rockfall.
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 ROCKFALL mean?

ROCKFALL noun
  1. A quantity of rocks that has fallen from a cliff etc.

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