We had this out - I want an end to it (5,4)
I believe the answer is:
death wish
'we had this out i want an end to it' is the definition.
The definition suggests a singular noun which matches the answer.
'we had this out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'we'+'had'+'this'='wehadthis'
'wehadthis' with letters rearranged gives 'DEATH WISH'.
Can you help me to learn more?
(Other definitions for death wish that I've seen before include "Reason for very reckless acts?" , "Desire for self-annihilation" , "destructive feeling" , "Unconscious desire to end it all" , "Desire to pass on" .)