Put to the test, in a way (3)
I believe the answer is:
use
'put to the test in a way' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for use that I've seen before include "Apply, employ" , "Benefit" , "Avail oneself of" , "Employ or exploit" , "Employ - advantage" .)