### Clue: First to support novice artist (6)
### Answer: CUBIST 
 ### Explanation: Definition: artist
  IST(looks like 1st,first with I,Roman numeral for 1) **placed below**(to support, in a down clue) CUB(novice, as in a cub reporter, scout, etc.). 
Answer: An artist of the school that reduces natural forms and their relationships to their geometrical shapes and planes.