Go with a girl, the ultimate in charm (3)
I believe the answer is:
vim
'go' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'with a girl the ultimate in charm' is the wordplay.
'with' says to put letters next to each other.
'a girl' becomes 'vi' (short for Violet).
'the ultimate in' indicates one should take the final letters.
The last letter of 'charm' is 'm'.
'vi'+'m' is 'VIM'.
Can you help me to learn more?
(Other definitions for vim that I've seen before include "Energy and vigour" , "Liveliness" , "Informal energy or drive" , "Pizazz" , "Pep (informal)" .)