Crossword Genius

Conrad is terribly caustic (8)

Ross

I believe the answer is:

sardonic

'caustic' is the definition.
(thesaurus)

'conrad is terribly' is the wordplay.
'terribly' is an anagram indicator.
'conrad'+'is'='conradis'
'conradis' with letters rearranged gives 'SARDONIC'.

(Other definitions for sardonic that I've seen before include "Cynical -- so rancid (anag)" , "Mocking or scornful" , "Dry, cynically mocking" , "Disdainfully or ironically humorous" , "Grimly cynical" .)

I've seen this clue in The Hindu.
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