Tubes preserve new laptop online (10)
I believe the answer is:
cannelloni
'tubes preserve new laptop online' is the definition.
I can't tell whether this definition defines the answer.
'preserve new laptop online' is the wordplay.
'preserve' becomes 'can' (canning is a kind of preserving).
'new' indicates an anagram.
'laptop' becomes 'l' (top of the word 'lap').
'l'+'online'='lonline'
'lonline' is an anagram of 'nelloni'.
'can'+'nelloni'='CANNELLONI'
Can you help me to learn more?
(Other definitions for cannelloni that I've seen before include "Italian food" , "course" , "Stuffed pasta rolls" .)