Local fruitcake from Schull by the sound of it perhaps (8)

I believe the answer is:

headcase

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

'local fruitcake' is the definition.
'headcase' can be an answer for 'fruitcake' (I've seen this before). I am unsure of the 'local' bit.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for headcase that I've seen before include "Crazy chap" , "fruitcake" , "Unstable person" , "One must be mad" , "Crazy person (slang)" .)

I've seen this clue in the Irish Times (Crosaire) and The Irish Times.

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