The most common and most likely answer to this crossword clue is the 6 plus 3 letter word DORSAL FIN
I've seen this crossword clue in Financial Times
D
O
R
S
A
L
F
I
N
More clues leading to the result DORSAL FIN
- Marine guide possibly working for island
- Fantastic island for bit of fish
- Scary sign for island divers?
- Fishy bit of fish Ronaldo cooked after removing tails
- Marine guide for island tours
- Piece of shark fillet starter popular with Golden Girl initially
- For island, awfully alarming sight in sea
- Classic Jaws feature showing when staff upped and left before end of film
- Part of shark seen above water: Floridans unsettled
Buddy explains!
The straight part
We know that "bit of fish" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bit of fish = dorsal fin.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.