Naivete displayed by politician meeting head (9)

I believe the answer is:

greenness

'naivete' is the definition.
(thesaurus)

'politician meeting head' is the wordplay.
'politician' becomes 'green' (eg member of the Green Party).
'meeting' says to put letters next to each other.
'head' becomes 'ness' (both can mean a promontory).
'green'+'ness'='GREENNESS'

'displayed by' is the link.

(Another definition for greenness that I've seen is " Quality of new leaves".)

I've seen this clue in The Times.

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