The most common and most likely answer to this crossword clue is the 4 plus 2 plus 2 plus 2 letter word SOCK IT TO ME
I've seen this crossword clue in The Guardian
S
O
C
K
I
T
T
O
M
E
Buddy explains!
The straight part
We know that "I’m ready for anything" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case i’m ready for anything = sock it to me.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.