Meadow bound not to be supplied with power (3)
I believe the answer is:
lea
'meadow' is the definition.
(a lea is a grassy area)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for lea that I've seen before include "'The lowing herd wind slowly o'er the . . .'" , "Open area of grassy or arable land" , "Grazing land" , "authority for teachers" , "Pasture, London river" .)