Crossword Genius

Barring Connery's lead, classic version of Bond (5)

Ross

I believe the answer is:

ionic

'version of bond' is the definition.
(ionic bond is a type of chemical bond)

I don't understand the rest of the clue.

(Other definitions for ionic that I've seen before include "in ancient Greece?" , "A classical order of architecture" , "Support (a weight)" , "not capped" , "Classical dialect" .)

I've seen this clue in The Guardian.
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