Mark every killer whale, any number from Balearic area (9)
I believe the answer is:
mallorcan
'balearic area' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'mark every killer whale any number' is the wordplay.
'mark' becomes 'm'.
'every' becomes 'all' (similar in meaning).
'killer whale' becomes 'orca' (synonyms).
'any number' becomes 'n' (mathematical symbol for an unspecified number).
'm'+'all'+'orca'+'n'='MALLORCAN'
'from' is the link.
Can you help me to learn more?
(Other definitions for mallorcan that I've seen before include "from Palma, perhaps" , "Islander" .)