Get ready to cut and stuff inside (7)
I believe the answer is:
prepare
'get ready to' is the definition.
(thesaurus)
'cut and stuff inside' is the wordplay.
'cut' becomes 'pare' (paring is a kind of cutting).
'and' means one lot of letters go next to another.
'stuff inside' becomes 'pre' (I can't justify this - if you can you should believe this answer much more).
'pare' put after 'pre' is 'PREPARE'.
Can you help me to learn more?
(Other definitions for prepare that I've seen before include "study" , "[GET READY] (3 of 3)" , "Make ready or suitable" , "Make (something) ready" , "Fit out" .)