Parent upset about one artist (7)
I believe the answer is:
painter
'artist' is the definition.
(I know that painter is a type of artist)
'parent upset about one' is the wordplay.
'upset' is an anagram indicator.
'about' indicates putting letters inside.
'one' becomes 'i' (Roman numeral).
'parent' is an anagram of 'panter'.
'panter' going around 'i' is 'PAINTER'.
(Other definitions for painter that I've seen before include "creative type" , "Rope; decorator" , "Line attached to the bow of a boat when tying up" , "something that could be described as 'ropy'!" , "One who draws" .)