The most common and most likely answer to this crossword clue is the 5 letter word SHEBA
I've seen this crossword clue in The Daily Telegraph
S
H
E
B
A
More clues leading to the result SHEBA
- Month for Jews taking time off in old Yemen
- Not a sound president backing Arabian kingdom
- That ship, we might say to a sailor coming up, is where Yemen is now
- Monarchy‘s female graduate
- Book graduate from Queen’s people
- Was its queen a graduate of Girton?
- That woman has degree from an old kingdom
- Woman born with a queen’s land
- In Exodus, he battles biblical kingdom
Buddy explains!

The straight part
We know that "Was its/queen" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case was its/queen = sheba.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.