One coming from nowhere puts out pictures (7)

I believe the answer is:
upstart
'one coming from nowhere' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'puts out pictures' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'pictures' becomes 'art'.
'puts' anagrammed gives 'upst'.
'upst'+'art'='UPSTART'
Can you help me to learn more?
(Other definitions for upstart that I've seen before include "Person suddenly risen in world, and arrogant" , "Over-assertive newcomer" , "Brash newcomer" , "Person who has suddenly risen in wealth or importance" , "New and arrogant arrival at high position" .)
