Disagreement about Marks & Spencer's opening in German city (5)

I believe the answer is:

worms

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'disagreement about marks spencer's opening in german city' is the definition.
I can't judge whether this definition defines the answer.

'disagreement about marks spencer's opening' is the wordplay.
'disagreement' becomes 'row' (row is a kind of disagreement).
'about' says the letters should be written in reverse.
'opening' indicates taking the first letters.
The first letters of 'marks spencers' is 'ms'.
'row' back-to-front is 'wor'.
'wor'+'ms'='WORMS'

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(Other definitions for worms that I've seen before include "Long soft-bodied limbless invertebrates" , "despicable people" , "Early birds' diet" , "harmful programs" , "Where reformer was condemned" .)

I've seen this clue in the Independent.

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