Unexpectedly, the army raids van from this Massachusetts island (7,8)

I believe the answer is:

marthas vineyard

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'this massachusetts island' is the definition.
'Martha's Vineyard' can be an answer for 'island' (island in Manhattan). I am not sure about the 'this massachusetts' bit.

'unexpectedly the army raids van' is the wordplay.
'unexpectedly' is an anagram indicator.
'the'+'army'+'raids'+'van'='thearmyraidsvan'
'thearmyraidsvan' is an anagram of 'MARTHAS VINEYARD'.

'from' is the link.

Can you help me to learn more?

(Other definitions for marthas vineyard that I've seen before include "island in Atlantic" , "US island" , "island off Cape Cod" .)

I've seen this clue in The Daily Express.

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