Tolstoy's lost, wilfully abandoned plays (4)
I believe the answer is:
toys
'plays' is the definition.
(I've seen this before)
'tolstoy's lost wilfully abandoned' is the wordplay.
'TOYS' is hidden in amongst the letters.
However, I am not sure how the hidden word is indicated.
(Other definitions for toys that I've seen before include "Things that provide amusement" , "Trifles with playthings" , "dolls, for example" , "Film" , "Children's playthings" .)