Crossword Genius

Gratuitous information? (3)

Ross

I believe the answer is:

tip

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'information?' is the definition.
(I know that tip is a type of counsel)

I don't understand the remainder of the clue.

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(Other definitions for tip that I've seen before include "The extreme end of something" , "given gratuitously" , "Point; sweetener" , "Hint, suggestion" , "for writers, it may be felt" .)

I've seen this clue in the Evening Standard.
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