Send daily broadcast? Do that and be damned (6,3)

I believe the answer is:
deadly sin
'do that and be damned' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'send daily broadcast?' is the wordplay.
'broadcast?' indicates anagramming the letters (letters scattered or cast around).
'send'+'daily'='senddaily'
'senddaily' is an anagram of 'DEADLY SIN'.
Can you help me to learn more?
(Other definitions for deadly sin that I've seen before include "Anger, say" , "Anger, covetousness, envy, gluttony, lust, pride or sloth" , "Greed, perhaps" , "Eg, lust or gluttony" , "It's one of seven, gluttony say" .)
