The most common and most likely answer to this crossword clue is the 8 letter word EXPLOITS
I've seen this crossword clue in The Daily Telegraph
E
X
P
L
O
I
T
S
Buddy explains!

The straight part
We know that "feats" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case feats = exploits.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 EXPLOITS mean?
EXPLOITS noun- A heroic or extraordinary deed.
- An achievement.
- A program or technique that exploits a vulnerability in other software.
- To use for one’s own advantage.
- To forcibly deprive someone of something to which she or he has a natural right.