The first person to get cloned is an Internet hit (4)
I believe the answer is:
meme
'an internet hit' is the definition.
I can't judge whether this defines the answer.
'the first person to get cloned' is the wordplay.
'the first person' becomes 'me' (first-person pronoun).
'to get' says to put letters next to each other.
'cloned' becomes 'me' (I can't justify this - if you can you should believe this answer much more).
'me'+'me'='MEME'
'is' acts as a link.
Can you help me to learn more?
(Other definitions for meme that I've seen before include "online phenomenon" , "Behavioural trait" , "Transmitted cultural idea" , "Question that spreads on the internet" , "Often trite image" .)