The most common and most likely answer to this crossword clue is the 5 letter word SNARL
I've seen this crossword clue in The Daily Telegraph
S
N
A
R
L
More clues leading to the result SNARL
- Angrily say ‘Get knotted!‘
- Get in a tangle and express displeasure
- Polar opposites, both sides separated by a menacing comment
- Runs slap into traffic jams
- Say angrily, “get knotted!”
- Protest before the judge, “It’s a mess”
- Plan ruse badly without energy? It’s a tangle
- Plans run possibly avoiding the latest evidence of congestion?
- Principally some Narikuravars are registering low growl
- Jungle bark
Buddy explains!

The straight part
We know that "Get in a tangle/express displeasure" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case get in a tangle/express displeasure = snarl.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 SNARL mean?
SNARL noun- A knot or complication of hair, thread, or the like, difficult to disentangle.
- An intricate complication; a problematic difficulty; a knotty or tangled situation.
- A slow-moving traffic jam.
- To entangle; to complicate; to involve in knots.
- To become entangled.
- To place in an embarrassing situation; to ensnare; to make overly complicated.
- To be congested in traffic, or to make traffic congested.
- To form raised work upon the outer surface of (thin metal ware) by the repercussion of a snarling iron upon the inner surface.
- The act of snarling; a growl; a surly or peevish expression; an angry contention.
- A growl, for example that of an angry or surly dog, or similar; grumbling sounds.
- A squabble.
- To growl angrily by gnashing or baring the teeth; to gnarl; to utter grumbling sounds.
- To complain angrily; to utter growlingly.
- To speak crossly; to talk in rude, surly terms.