Remove a long piece (5)
I believe the answer is:
strip
This clue is a double definition.
'remove' is the first definition.
(stripping is a kind of removing)
'a long piece' is the second definition.
(long strip of material)
(Other definitions for strip that I've seen before include "Series of cartoon pictures - undress salaciously" , "Thin piece" , "Undress completely" , "Remove clothing" , "Remove covering from" .)