Sea-food rascal found on island (6)
I believe the answer is:
scampi
'sea-food' is the definition.
I can't judge whether this defines the answer.
'rascal found on island' is the wordplay.
'rascal' becomes 'scamp' (synonyms).
'found on' says to put letters next to each other.
'island' becomes 'i' (geographical abbreviation).
'scamp'+'i'='SCAMPI'
Can you help me to learn more?
(Other definitions for scampi that I've seen before include "Dish of fried shrimp or prawns" , "Type of seafood" , "Edible crustaceans" , "sort of seafood" , "Dish of cooked shrimps or prawns" .)