Crossword Genius

Originated, for instance during Prohibition (5)

Ross

I believe the answer is:

began

'originated' is the definition.
(I've seen this in another clue)

'for instance during prohibition' is the wordplay.
'for instance' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'during' is an insertion indicator.
'prohibition' becomes 'ban' (synonyms).
'eg' inserted into 'ban' is 'BEGAN'.

(Another definition for began that I've seen is " Commenced, started".)

I've seen this clue in the Evening Standard.
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