The Crossword Centre Clue-Writing Competition

CCCWC May competition voters’ comments
 
Clue no. 17: Car crash with none inside – blessing in disguise (6)

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A clue to BINGLE.
2 comments refer to this clue (from 2 competitors, 0 others)

Here is the text

Comments on the clue
1.Nice surface but wordplay does not suggest removal of central letters.
2.How does none = no SS?