Loud girl full of dazzle and ostentation (10)

I believe the answer is:

flashiness

'ostentation' is the definition.
(thesaurus)

'loud girl full of dazzle' is the wordplay.
'loud' becomes 'f' (short for forte - 'loud' in music).
'girl' becomes 'lass' (lass can informally mean a girl).
'full of' means one lot of letters goes inside another.
'dazzle' becomes 'shine' (I've seen this before).
'lass' going around 'shine' is 'lashiness'.
'f'+'lashiness'='FLASHINESS'

'and' acts as a link.

(Another definition for flashiness that I've seen is " flamboyance".)

I've seen this clue in The Guardian.

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