Crossword Genius

A commercial undertaking that's risky, perhaps (12)

Ross

I believe the answer is:

peradventure

'perhaps' is the definition.
(synonyms)

'a commercial undertaking that's risky' is the wordplay.
'a' becomes 'per' (eg 'one a day' means 'one per day').
'commercial' becomes 'ad' (abbreviation for advertisement).
'undertaking that's risky' becomes 'venture' (venture can mean a risky undertaking or journey).
'per'+'ad'+'venture'='PERADVENTURE'

(Other definitions for peradventure that I've seen before include "Maybe" , "by chance" , "perhaps" , "Possibly (archaic)" .)

I've seen this clue in The Independent.
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