Notepad's pacy new IT tool (4-3-5)
I believe the answer is:
copy and paste
'it tool' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'notepad's pacy new' is the wordplay.
'new' indicates an anagram.
'notepads'+'pacy'='notepadspacy'
'notepadspacy' is an anagram of 'COPY AND PASTE'.
Can you help me to learn more?
(Other definitions for copy and paste that I've seen before include "Computer technique for moving blocks of text" , "Way to move computer text" .)