Crossword Genius

"Then what happened!?" (3)

Ross

I believe the answer is:

and

'then what happened?' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for and that I've seen before include "Word to connect" , "Joining word" , "it needs wholly positive input for positive result" , "A very common conjunction" , "It connects words, clauses or sentences" .)

I've seen this clue in the LA Times and The Wall Street Journal.
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