Arrogant person puts out painting (7)
I believe the answer is:
upstart
'arrogant person' is the definition.
'puts out painting' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'painting' becomes 'art' (I've seen this before).
'puts' is an anagram of 'upst'.
'upst'+'art'='UPSTART'
(Other definitions for upstart that I've seen before include "Person who has risen quickly, and arrogant with it" , "someone pretentious" , "Arrogant person new in high position" , "Arriviste, parvenu" , "Arrogant Johnny-come-lately" .)