German agreed, maniac in novel is wrecking story (7,3)

I believe the answer is:

jamaica inn

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'wrecking story' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'german agreed maniac in novel' is the wordplay.
'german agreed' becomes 'ja' ('yes' in German).
'novel' indicates anagramming the letters (letters in a new or novel order).
'maniac'+'in'='maniacin'
'maniacin' with letters rearranged gives 'maicainn'.
'ja'+'maicainn'='JAMAICA INN'

'is' acts as a link.

Can you help me to learn more?

(Other definitions for jamaica inn that I've seen before include "Book by Daphne du Maurier" , "work of fiction" , "story of seaside crime" , "Daphne du Maurier novel" .)

I've seen this clue in The Times.

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