Calamitous choice, nowadays (6)
I believe the answer is:
deadly
This clue might be a double definition.
'calamitous' is the first definition.
(thesaurus)
'choice nowadays' is the second definition.
Both the answer and definition are adverbs. Maybe there's an association between them I don't understand?
Can you help me to learn more?
(Other definitions for deadly that I've seen before include "Lethal, capable of killing" , "Lethal or mortal" , "Lethal, capable of causing fatal injury" , "No small bore" , "sniper aspires to be" .)