Unimportant figures in art, possibly (6)
I believe the answer is:
trivia
'unimportant figures in art possibly' is the definition.
I can't judge whether this defines the answer.
'figures in art possibly' is the wordplay.
'figures' becomes 'ivi' (I can't justify this - if you can you should give a lot more credence to this answer).
'in' means one lot of letters goes inside another.
'possibly' is an anagram indicator.
'art' is an anagram of 'tra'.
'ivi' put inside 'tra' is 'TRIVIA'.
Can you help me to learn more?
(Other definitions for trivia that I've seen before include "Useless information - trifles" , "Unimportant things, don't waste time on them" , "Petty details" , "Small beer" , "Something of little importance" .)