Almost all of the correct words to insert have been suggested in other users' answers, just not all together. However, I believe the true combination is:
Who’s On FIRST2
We CONDEMN the excessive use of force2
OUR World In Data1
VERY (online retailer)@Stiv
Apologies for my FEEBLE attempt at humour!@OP
Smoking is bad FOR you1
EVERYTHING Is Awesome1
A spelling error FOLLOWS this clue@OP (since 'Fiegenbaum' should be spelled 'Feigenbaum')
1 First found by @QuantumTwinkie
2 First found by @tmpearce
3 First found by @Bewilderer
A cryptic crossword clue! AT FIRST CONDEMN OUR VERY FEEBLE EXCUSE FOR EVERYTHING THAT FOLLOWS CONSTANT NEGATIVE PRESS.
How do we interpret this?
'At first' implies we need to take the first letters of the words which follow, and this will yield a word 'THAT FOLLOWS CONSTANT NEGATIVE PRESS'. The initials of the words in between spell the answer: COVFEFE!
This is of course a reference to:
A very famous mis-tweet by President Donald Trump of the USA, in which he tweeted to his millions of followers:
"Despite the constant negative press covfefe"
(See how 'covfefe' quite literally follows the words 'constant negative press' here?)
Still nobody truly knows what he meant to say, although many people suspected he hadn't yet had his morning covfefe, so it's no wonder it came out wrong!