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One changes with the wind and is utterly narcissistic (4)

Ross

I believe the answer is:

vane

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

'one changes with the wind and' is the definition.
I can't tell whether this definition defines the answer.

'utterly narcissistic' is the wordplay.
'utterly' indicates a 'sounds like' (homophone) clue (as uttered).
'narcissistic' becomes 'vain' (I've seen this before).
'vain' sounds like 'VANE'.

'is' is the link.

Can you help me to learn more?

(Other definitions for vane that I've seen before include "It shows wind direction" , "The weather-cock sounds conceited" , "Weather-cock sounds full of itself" , "Blade of a propeller" , "Part of a weathercock" .)

I've seen this clue in the Sydney Morning Herald.
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