Composer is involved with duel (6)

I believe the answer is:

delius

'composer' is the definition.
(I know that Delius is a composer)

'is involved with duel' is the wordplay.
'involved with' is an anagram indicator (involved can mean confusing or complex).
'is' mixed up with 'duel' makes 'DELIUS'.

(Other definitions for delius that I've seen before include "Frederick -, Brigg Fair composer" , "The Walk to the Paradise Garden composer" , "Bradford-born composer" , "Frederick -, nature-inspired Eng. composer" , "English composer, Frederick (1862-1934)" .)

I've seen this clue in The Globe and Mail.

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