Made do with iron arrangement for a traditional scalar structure (6,4)

I believe the answer is:

dorian mode

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'a traditional scalar structure' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'made do with iron arrangement' is the wordplay.
'with' means one lot of letters go next to another.
'arrangement' is an anagram indicator.
'made'+'do'='madedo'
'madedo' after 'iron' is 'ironmadedo'.
'ironmadedo' is an anagram of 'DORIAN MODE'.

'for' is the link.

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I've seen this clue in The Guardian.

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