Crossword Genius

Picture created from this one time in gentleman's address (6)

Ross

I believe the answer is:

imager

'picture created from this' is the definition.

'one time in gentleman's address' is the wordplay.
'one' becomes 'i' (Roman numeral).
'time' becomes 'age' (age is a kind of time).
'in' is an insertion indicator.
'gentleman's address' becomes 'mr'.
'age' put inside 'mr' is 'mager'.
'i'+'mager'='IMAGER'

I've seen this clue in The Independent.
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