Different menus are what's needed for computer access? (8)
I believe the answer is:
username
'what's needed for computer access?' is the definition.
(you use a username to log in)
'different menus are' is the wordplay.
'different' indicates anagramming the letters.
'menus'+'are'='menusare'
'menusare' anagrammed gives 'USERNAME'.
(Other definitions for username that I've seen before include "One's identifier on a computer" , "Login ID" , "Electronic identity" , "Person's computer ID" , "Something needed for logging in" .)