School place isn't filled by artful type (3)
I believe the answer is:
sly
'filled by artful type' is the definition.
The answer and definition are not the same part of speech. However, past participle verbs and adjectives sometimes define each other.
'school place isn't' is the wordplay.
'school' becomes 's'.
'place isn't' becomes 'ly' (I can't explain this - if you can you should give a lot more credence to this answer).
's'+'ly'='SLY'
Can you help me to learn more?
(Other definitions for sly that I've seen before include "Unpleasantly cunning and secretive" , "Devious, cunning" , "Devious and furtive" , "Sneaky" , "Wily, shifty" .)