Feel divided about values — not half, producing this? (11)
I believe the answer is:
ambivalence
'feel divided about values not half producing this?' is the definition.
The definition suggests a singular noun which matches the answer.
This is all the clue.
Can you help me to learn more?
(Other definitions for ambivalence that I've seen before include "being of two minds" , "uncertainty" , "Mixed feelings (E, not Y)" , "conflicting emotions" .)