The most common and most likely answer to this crossword clue is the 4 letter word FLIP
I've seen this crossword clue in Independent
F
L
I
P
More clues leading to the result FLIP
- Toss drink and lose it
- Toss drink ā and lose it
- Get angry following cheeky talk
- Pert, following kiss
- Fellow on edge may do so
- Loud impertinence making one go mad
- Frivolous female banter
- Get angry following backchat
- Policy U-turn could make you suddenly get very angry, then collapse
- Go berserk over debacle ā put your foot in it!
Buddy explains!

The straight part
We know that "Pert" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pert = flip.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 FLIP mean?
FLIP noun- A maneuver which rotates an object end over end.
- A complete change of direction, decision, movement etc.
- A slingshot.
- A hairstyle popular among boys in the 1960sā70s and 2000sā10s, in which the hair goes halfway down the ears, at which point it sticks out
- The purchase of an asset (usually a house) which is then improved and sold quickly for profit.
- To throw so as to turn over.
- To put into a quick revolving motion through a snap of the thumb and index finger.
- To win a state (or county) won by another party in the preceding elections
- To turn state's evidence; to agree to testify against one's co-conspirators in exchange for concessions from prosecutors.
- To induce someone to turn state's evidence; to get someone to agree to testify against their co-conspirators in exchange for concessions.
- To go berserk or crazy.
- To buy an asset (usually a house), improve it and sell it quickly for profit.
- To invert a bit (binary digit), changing it from 0 to 1 or from 1 to 0.
- Used to express annoyance, especially when the speaker has made an error.
- Having the quality of playfulness, or lacking seriousness of purpose.
- Sarcastic.
- Disrespectful, flippant.
- A mixture of beer, spirit, etc., stirred and heated by a hot iron (a flip dog).