Problem involving husband, bar, drunk - it generates conversation (7)
I believe the answer is:
rhubarb
'it generates conversation' is the definition.
The definition suggests a singular noun which matches the answer.
'problem involving husband bar drunk' is the wordplay.
'problem' becomes 'rub' ('there's the rub').
'involving' means one lot of letters goes inside another.
'husband' becomes 'h' (abbreviation).
'drunk' indicates putting letters inside (inserted letters are drunk in).
'rub' going around 'h' is 'rhub'.
'rhub' going around 'bar' is 'RHUBARB'.
Can you help me to learn more?
(Other definitions for rhubarb that I've seen before include "Plant grown for its stalks" , "Stage chatter" , "Large-leaved plant" , "Plant stem used as fruit" , "Leaf stalks eaten stewed" .)