Crossword Genius

Vital path to civilisation (3,2,4)

Ross

I believe the answer is:

way of life

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

'vital path' is the definition.
'way of life' can be an answer for 'path' (synonyms). I'm not sure about the 'vital' bit.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Another definition for way of life that I've seen is " Style of existence".)

I've seen this clue in The Daily Express.
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