Scientist working more on arts? (10)
I believe the answer is:
astronomer
'scientist' is the definition.
(astronomer is a kind of scientist)
'working more on arts?' is the wordplay.
'working' indicates anagramming the letters.
'more'+'on'+'arts'='moreonarts'
'moreonarts' is an anagram of 'ASTRONOMER'.
(Other definitions for astronomer that I've seen before include "Stargazer" , "One studying the universe" , "Sky-at-night observer" , "Dorado may be contemplated by me" , "scientist" .)