Rolling grass shows way to be followed (3)
I believe the answer is:
tao
'way to be followed' is the definition.
I can't judge whether this defines the answer.
'rolling grass' is the wordplay.
'rolling' is a reversal indicator.
'grass' becomes 'oat' (oat is a type of grass).
'oat' in reverse letter order is 'TAO'.
'shows' acts as a link.
Can you help me to learn more?
(Other definitions for tao that I've seen before include "Source of existence (Chinese)" , "true path" , "Element of Chinese philosophy" , "In China, code of behaviour in harmony with natural order" , "religious way" .)