Mysterious objects oddly put to sea around Morecambe? (9)

I believe the answer is:

esoterica

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'mysterious objects' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

(Other definitions for esoterica that I've seen before include "obscure knowledge" , "specialist publications" , "Specialized publications" , "Mystic objects" , "Mysterious or secret things" .)

I've seen this clue in The Telegraph.

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