Become gradually less (7)
I believe the answer is:
dwindle
(Other definitions for dwindle that I've seen before include "Become steadily less" , "tail off" , "Get smaller, less" , "Become smaller or fewer" , "Diminish - shrink slowly" .)
I believe the answer is:
dwindle
(Other definitions for dwindle that I've seen before include "Become steadily less" , "tail off" , "Get smaller, less" , "Become smaller or fewer" , "Diminish - shrink slowly" .)