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 can't 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' means one lot of letters go next to another (I've seen this in other clues).
'the herbalist's?' becomes 'ru' (I can't justify this - if you can you should believe this answer much more).
'e' 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?" .)