Lisa folded a piece of canvas (4)
I believe the answer is:
sail
'a piece of canvas' is the definition.
'lisa folded' is the wordplay.
'folded' is an anagram indicator.
'lisa' with letters rearranged gives 'SAIL'.
(Other definitions for sail that I've seen before include "Canvas on board" , "It catches the wind on a mast" , "Spanker, say" , "Canvas sheet" , "Travel by boat" .)