Prove ineffective, as would Shackleton’s Endurance ultimately? (3,2,3)
I believe the answer is:
cut no ice
I'm afraid I can't explain this answer.
Can you help me to learn more?
(Other definitions for cut no ice that I've seen before include "Fail to split frozen water and count or nothing" , "Blunt skates will" , "Fail to convince" , "Roller skates will" , "Be ineffective" .)