Pool fill (5)
I believe the answer is:
water
(Other definitions for water that I've seen before include "Give fluid to (plants)" , "Superior's full of it" , "Diamond quality" , "Transparent liquid" , "Irrigate" .)
I believe the answer is:
water
(Other definitions for water that I've seen before include "Give fluid to (plants)" , "Superior's full of it" , "Diamond quality" , "Transparent liquid" , "Irrigate" .)