The most common and most likely answer to this crossword clue is the 11 letter word DISOBEDIENT
I've seen this crossword clue in The Daily Telegraph
D
I
S
O
B
E
D
I
E
N
T
Buddy explains!

The straight part
We know that "being like Adam" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case being like adam = disobedient.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 DISOBEDIENT mean?
DISOBEDIENT noun- One who disobeys.
- Not obedient.