School of meditation (3)
I believe the answer is:
zen
'school of meditation' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for zen that I've seen before include "School of Buddhism" , "Form of Buddhism emphasising meditation and intuition" , "branch of religion" , "Form of Buddhism that says meditation brings enlightenment" , "Contemplative school" .)