Trusted friends at college begin here (4,4)

I believe the answer is:

main menu

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'trusted friends' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'at college begin here' is the wordplay.
'at' means one lot of letters go next to another.
'college' becomes 'u' (abbreviation for University).
'begin here' becomes 'mainmen' (I can't explain this - if you can you should give a lot more credence to this answer).
'u' after 'mainmen' is 'MAIN MENU'.

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I've seen this clue in The Guardian.

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