Nothing should interrupt Mahler's elaborate openings (8)

I believe the answer is:

armholes

'openings' is the definition.
(armhole is a kind of opening)

'nothing should interrupt mahler's elaborate' is the wordplay.
'nothing' becomes 'O' (O resembles 0).
'should interrupt' is an insertion indicator.
'elaborate' indicates an anagram (an elaborate version of the letters).
'mahlers' anagrammed gives 'armhles'.
'o' inserted within 'armhles' is 'ARMHOLES'.

(Another definition for armholes that I've seen is " Where sleeves are attached".)

I've seen this clue in The Independent.

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