Gaulish warrior wanting ten daggers (5)

I believe the answer is:

obeli

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

I cannot understand how the remainder of the clue works.

(Other definitions for obeli that I've seen before include "Dagger symbols, reference marks in print" , "Little daggers" , "Marks on script" , "Dagger signs for footnotes" , "Printers' marks; be oil (anag.)" .)

I've seen this clue in The Guardian.

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