Subjects the artist is unlikely to drop?
I believe the answer is:
'subjects' is the definition.
The answer and definition can be both people as well as being plural nouns.
Maybe they are linked in a way I don't understand?
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for sitters that I've seen before include "Models" , "Easy catches" .)