Cut material for the floor, moving in later (4)
I believe the answer is:
loin
'cut' is the definition.
(I know that loin is a type of cut)
'material for the floor moving in later' is the wordplay.
I cannot really see how this works, but
'in' is present in the answer.
The remaining letters 'lo' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
(Other definitions for loin that I've seen before include "Cut of meat from the lower back and sides" , "Either side of the backbone between the hip bone and ribs" , "Part of the body to which "lumbar" refers" , "Part of the back - cut of meat" , "Meat between the ribs and rump of an animal" .)