Crossword Genius

I'm a long time making pictures (6)

Ross

I believe the answer is:

images

'pictures' is the definition.
(I know this)

'i'm a long time' is the wordplay.
'a long time' becomes 'ages' (I've seen this before).
'im'+'ages'='IMAGES'

'making' is the link.

(Other definitions for images that I've seen before include "Reflections in mirrors" , "Visual counterparts in lens or mirror" , "Likenesses or impressions" , "Mental representations or figures" , "Pictures; metaphors" .)

I've seen this clue in the Evening Standard.
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