Cracked intellectual? (7)

I believe the answer is:

egghead

I believe this is a double definition.

'cracked' is the first definition.
(I've seen this before)

'intellectual?' is the second definition.
(egghead is a kind of intellectual)

(Other definitions for egghead that I've seen before include "Intellectual - highbrow" , "Brainbox" , "Expert" , "Heed gag about slang intellectual" , "scholar" .)

I've seen this clue in The Globe and Mail.

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