Having a high position, sounds vain (4)

I believe the answer is:

vane

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'having a high position' is the definition.
I can't judge whether this definition defines the answer.

'sounds vain' is the wordplay.
'sounds' shows a homophone (sound like).
'vain' is a homophone of 'VANE'.

Can you help me to learn more?

(Other definitions for vane that I've seen before include "Turbine blade" , "Weather blade" , "Indicator of wind direction" , "Device that rotates to show the direction of the wind" , "Blade of windmill" .)

I've seen this clue in the Evening Standard.

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