Crossword Genius

Found duke leaving to get hold of new cloak (7)

Ross

I believe the answer is:

envelop

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'cloak' is the definition.
(thesaurus)

I can't explain the rest of the clue.

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(Other definitions for envelop that I've seen before include "Give all-round cover" , "Shroud, cover up" , "Wrap up, cover on all sides" , "Enfold, enwrap" , "Compass" .)

I've seen this clue in The Hindu.
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