The most common and most likely answer to this crossword clue is the 6 letter word STOMPS
I've seen this crossword clue in The Guardian
S
T
O
M
P
S
Buddy explains!

The straight part
We know that "Walks angrily" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case walks angrily = stomps.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 STOMPS mean?
STOMPS noun- A deliberate heavy footfall; a stamp.
- A dance having a heavy, rhythmic step.
- The jazz music for this dance.
- To trample heavily.
- To severely beat someone physically or figuratively.