Minute Cryptic

Our definition here is 'Memento', and our answer will be another word for that.

This clue's indicators are 'extremely', 'forgetful', 'in', and 'recut'. One of these is an anagram indicator suggesting that we'll need to edit a neighbouring word by rearranging it. Another is a selection indicator pointing out which letter(s) to focus on. A deletion indicator tells us to ignore some letters, and a containing indicator guides us to put something inside something else.

This clue's fodder is 'Guy' and 'version'. We'll use these letters (or some of them) to construct our answer, as guided by the clue's indicator(s).