Girl wraps one in torn material (5)
I believe the answer is:
alice
'torn material' is the definition.
The definition suggests a singular noun which matches the answer.
'girl wraps one in' is the wordplay.
'girl wraps' becomes 'li' (I can't explain this - if you can you should believe this answer much more).
'one' becomes 'ace' (ace has a value of one in some card games).
'in' means one lot of letters goes inside another.
'li' put into 'ace' is 'ALICE'.
Can you help me to learn more?
(Other definitions for alice that I've seen before include "Immortal girl created by Lewis Carroll" , "Girl famed for Wonderland adventures" , "Girl in literary Wonderland" , "Wondergirl" , "A Town Like - - (novel/film)" .)