"Oh, what's the ___?" (3)
I believe the answer is:
use
(Other definitions for use that I've seen before include "Put to a particular purpose" , "Manipulate" , "Employ, put into service" , "Function, purpose" , "Profit" .)
I believe the answer is:
use
(Other definitions for use that I've seen before include "Put to a particular purpose" , "Manipulate" , "Employ, put into service" , "Function, purpose" , "Profit" .)