The most common and most likely answer to this crossword clue is the 4 letter word PROS
I've seen this crossword clue in The Guardian
P
R
O
S
More clues leading to the result PROS
Buddy explains!

The straight part
We know that "benefits" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case benefits = pros.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 PROS mean?
PROS noun- An advantage of something, especially when contrasted with its disadvantages (cons).
- A person who supports a concept or principle.
- A professional sportsman.
- Professional.
- A prostitute.
- A proproctor.