The most common and most likely answer to this crossword clue is the 6 letter word COPIED
C
O
P
I
E
D
Buddy explains!

The straight part
We know that "made a replica" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case made a replica = copied.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does COPIED mean?
COPIED verb- To produce an object identical to a given object.
- To give or transmit a copy to (a person).
- To place a copy of an object in memory for later use.
- To imitate.
- To receive a transmission successfully.