Whale led by pack round island (7)
I believe the answer is:
majorca
'island' is the definition.
(I've seen this before)
'whale led by pack round' is the wordplay.
'whale' becomes 'orca' (orca is a kind of whale).
'led by' is a charade indicator (letters next to each other).
'pack round' becomes 'maj' (I can't justify this - if you can you should believe this answer much more).
'orca' after 'maj' is 'MAJORCA'.
Can you help me to learn more?
(Other definitions for majorca that I've seen before include "holiday resort" , "Largest Balearic Island" , "Palma its capital" , "Holiday island" , "Largest of the Balearic Islands" .)