Serious about island resort (7)

I believe the answer is:

majorca

I'm a little stuck... Click here to teach me more about this clue!

'island resort' is the definition.
The definition suggests a singular noun which matches the answer.

'serious about' is the wordplay.
'serious' becomes 'major' (I've seen this in another clue).
'about' becomes 'ca' (circa).
'major'+'ca'='MAJORCA'

Can you help me to learn more?

(Other definitions for majorca that I've seen before include "Palma its capital" , "holiday destination ..." , "Largest Balearic Island" , "Holiday island" , "Main Balearic island" .)

I've seen this clue in The Independent.

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