Promise with total certainty (9)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
guarantee
(Other definitions for guarantee that I've seen before include "Something ensuring a particular outcome" , "Promising" , "Formal assurance" , "Undertake" , "security system" .)
I believe the answer is:
guarantee
(Other definitions for guarantee that I've seen before include "Something ensuring a particular outcome" , "Promising" , "Formal assurance" , "Undertake" , "security system" .)