Blue backs mobbing our home scorer (5)

I believe the answer is:

dukas

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

I don't understand the rest of the clue.

(Other definitions for dukas that I've seen before include "French composer (The Sorcerer's Apprentice)" , "French composer, 1865-1935" .)

I've seen this clue in The Independent.

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