Fungi she cultivated, demonstrating Chinese philosophy (4,4)
I believe the answer is:
feng shui
'philosophy' is the definition.
(I know that feng shui is a type of philosophy)
'fungi she cultivated' is the wordplay.
'cultivated' indicates anagramming the letters.
'fungi'+'she'='fungishe'
'fungishe' anagrammed gives 'FENG SHUI'.
'demonstrating chinese' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for feng shui that I've seen before include "Rules of furniture arrangement -- huge fins (anag)" , "Chinese system of environmental energies" , "Chinese energy system for optimising buildings" , "Chinese system of energy flows" , "Chinese system governing spatial arrangement" .)