The most common and most likely answer to this crossword clue is the 13 letter word REDISTRIBUTES
R
E
D
I
S
T
R
I
B
U
T
E
S
Buddy explains!
The straight part
We know that "what he does in Robin-Hood act" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case what he does in robin-hood act = redistributes.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 REDISTRIBUTES mean?
REDISTRIBUTES verb- To distribute again.