Amazing drug, crack? Something telling me to think twice (8)
I believe the answer is:
superego
'something telling me to think twice' is the definition.
I can't judge whether this defines the answer.
'amazing drug crack?' is the wordplay.
'amazing' becomes 'super' (I've seen this in another clue).
'drug' becomes 'e' (E is another name for ecstasy).
'crack?' becomes 'go' (to have a crack is to have a go or turn).
'super'+'e'+'go'='SUPEREGO'
Can you help me to learn more?
(Other definitions for superego that I've seen before include "self-critic" , "Part of mind acting as conscience" , "self-criticism?" , "Freudian concept of conscience" , "piece of his mind?" .)