Crossword Genius

Open your mind and arrange short vacations for flower-children at the start of October. (12)

Ross

I believe the answer is:

philosophise

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

'open' is the definition.
Although both the answer and definition are verbs in their base form, I don't see how one could define the other.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Another definition for philosophise that I've seen is " Reason about deep and fundamental issues".)

I've seen this clue in The Irish Times.
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