A vulgar person puts a new construction on art (7)
I believe the answer is:
upstart
'a vulgar person' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'puts a new construction on art' is the wordplay.
'new' is an anagram indicator.
'construction on art' becomes 'rt' (I am not sure about this - if you are sure you should believe this answer much more).
'puts'+'a'='putsa'
'putsa' is an anagram of 'upsta'.
'upsta'+'rt'='UPSTART'
Can you help me to learn more?
(Other definitions for upstart that I've seen before include "Arriviste, parvenu" , "Presumptuous and arrogant type" , "Brash newcomer" , "Arrogant person new in high position" , "One who suddenly rises from nowhere to importance" .)