The most common and most likely answer to this crossword clue is the 5 plus 4 letter word TAMIL NADU
T
A
M
I
L
N
A
D
U
More clues leading to the result TAMIL NADU
- Adult man, I suspect, in a state in India
- Adult, one man’s transformed state
- Development of main adult state
- University east of land I’m at, travelling in Indian state
- State ambiguously 'I’m an adult'
- State Waltzing Matilda is captivating number for all to see
- I’m an adult in a state, in a state
- State furiously: ‘I’m an adult!’
Buddy explains!

The straight part
We know that "Indian state" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case indian state = tamil nadu.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.