Crossword Genius

Ridiculous brain an egghead possesses (5)

Ross

I believe the answer is:

inane

'ridiculous' is the definition.
(thesaurus)

'brain an egghead possesses' is the wordplay.
'possesses' indicates a hidden word.
'INANE' is hidden in the letters of 'brain an egghead'.

(Other definitions for inane that I've seen before include "Frivolous" , "Silly, witless" , "Lacking meaning" , "Fatuous, asinine" , "Fatuous, vacuous" .)

I've seen this clue in The Telegraph.
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