To no __: fruitlessly (5)
I believe the answer is:
avail
(Other definitions for avail that I've seen before include "Be useful" , "Provide help; profit" , "Use to one's advantage" , "Make use, take advantage" , "See 3" .)
I believe the answer is:
avail
(Other definitions for avail that I've seen before include "Be useful" , "Provide help; profit" , "Use to one's advantage" , "Make use, take advantage" , "See 3" .)