Picasso's field (3)
I believe the answer is:
art
'picasso's field' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for art that I've seen before include "Painting, for instance" , "Eg, paintings, sculpture" , "Lovely piece of work" , "''... is long and life is short''" , "Skill in a specified thing" .)