Wish you hadn't got it at the herbalist's? (3)
I believe the answer is:
rue
'wish you hadn't' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'it at the herbalist's?' is the wordplay.
'it' becomes 'e' ('e' can mean 'electronic' which is similar to 'IT').
'at' is a charade indicator (letters next to each other) (I've seen this in other clues).
'the herbalist's?' becomes 'ru' (I am not sure about this - if you are sure you should believe this answer much more).
'e' put after 'ru' is 'RUE'.
'got' acts as a link.
Can you help me to learn more?
(Other definitions for rue that I've seen before include "Feel sorry" , "Regret, be sorry for" , "show regret" , "Repentant sort of shrub?" , "Swann's way?" .)