Ascertain (6)
'ascertain' is the definition.
(I know that ascertain can be written as ensure)
This is all the clue.
(Other definitions for ensure that I've seen before include "Make certain or safe" , "Make certain, secure" , "Make certain for the future" , "warrant" , "Guarantee" .)
'ascertain' is the definition.
(I know that ascertain can be written as see)
This is the entire clue.
(Other definitions for see that I've seen before include "judge" , "twig" , "Observe the papacy in Rome" , "... have interview with" , "ecclesiastical division" .)