Crossword Genius

Egghead perhaps I let call tune disastrously (12)

Ross

I believe the answer is:

intellectual

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

'i let call tune disastrously' is the wordplay.
'disastrously' is an anagram indicator (I've seen this in other clues).
'let'+'call'+'tune'='letcalltune'
'letcalltune' anagrammed gives 'ntellectual'.
'i'+'ntellectual'='INTELLECTUAL'

'perhaps' acts as a link.

(Other definitions for intellectual that I've seen before include "One with highly-developed mental powers" , "Scholarly" , "Thinking type" , "Academic" , "Related to rational thought processes" .)

I've seen this clue in The Times.
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