The most common and most likely answer to this crossword clue is the 9 letter word HOMEGROWN
I've seen this crossword clue in Financial Times
H
O
M
E
G
R
O
W
N
More clues leading to the result HOMEGROWN
Buddy explains!

The straight part
We know that "Native" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case native = homegrown.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 HOMEGROWN mean?
HOMEGROWN adjective- Grown at home.
- Created or constructed in an informal or amateur manner; done without formal assistance, as from a business, organization, or professional.
- Raised or brought up in one's own country.
- Originating in one's own country.