All the difference between life and death? (6)
I believe the answer is:
lethal
'between life and death?' is the definition.
I can't judge whether this defines the answer.
'all the difference' is the wordplay.
'difference' indicates an anagram.
'all'+'the'='allthe'
'allthe' is an anagram of 'LETHAL'.
Can you help me to learn more?
(Other definitions for lethal that I've seen before include "Murderous" , "very nasty indeed" , "Able to cause death" , "Vicious" , "Liable to cause death" .)