Crossword Genius

Perhaps writer of Happy Birthday's more friendly – not initially (4)

Ross

I believe the answer is:

info

I'm a little stuck... Click here to teach me more about this clue!

'perhaps writer' is the definition.
(I know that writer is a profession)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for info that I've seen before include "Facts; knowledge gained" , "News" , "Latest" , "Gen (colloq.)" , "Dope" .)

I've seen this clue in The Everyman puzzle in The Observer.
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