Eg wide passage out, not one taken by painter (5)
I believe the answer is:
extra
'eg wide' is the definition.
(wide is a type of extra in cricket)
'passage out not one taken by painter' is the wordplay.
'passage out' becomes 'exit' (I've seen this in another clue).
'not' is a deletion indicator.
'one' becomes 'i' (Roman numeral).
'taken' is a charade indicator (letters next to each other).
'by painter' becomes 'ra' (member of the Royal Academy of Arts. I am not sure about the 'by' bit.).
'exit' with 'i' removed is 'ext'.
'ext'+'ra'='EXTRA'
Can you help me to learn more?
(Other definitions for extra that I've seen before include "Bit actor in film" , "Player with no lines" , "Sundry" , "he plays his part" , "spotted at rear of the platoon?" .)