Tool modifying iTunes with lead to laptop (7)
I believe the answer is:
utensil
'tool' is the definition.
(I've seen this before)
'modifying itunes with lead to laptop' is the wordplay.
'modifying' indicates an anagram (I've seen 'modified' mean this).
'with' is a charade indicator (letters next to each other).
'lead to' says to take the initial letters.
The first letter of 'laptop' is 'l'.
'itunes' is an anagram of 'utensi'.
'utensi'+'l'='UTENSIL'
(Other definitions for utensil that I've seen before include "Mandolin, perhaps" , "Implement for practical use" , "Tool for practical use" , "Let us in (anag) -- implement" , "Can opener, for example" .)