The most common and most likely answer to this crossword clue is the 5 letter word PADDY
I've seen this crossword clue in The Sunday Telegraph
P
A
D
D
Y
Buddy explains!

The straight part
We know that "Land in Eas/fit of temper" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case land in eas/fit of temper = paddy.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 PADDY mean?
PADDY noun- Rough or unhusked rice, either before it is milled or as a crop to be harvested.
- A paddy field, a rice paddy; an irrigated or flooded field where rice is grown.
- Low; mean; boorish; vagabond.
- A fit of temper; a tantrum
- A white person.
- A labourer's assistant or workmate.
- A drill used in boring wells, with cutters that expand on pressure.