The most common and most likely answer to this crossword clue is the 5 letter word HONEY
I've seen this crossword clue in Independent
H
O
N
E
Y
More clues leading to the result HONEY
- Keen Yankee gets treasure or similar
- Sweetheart’s quarters in the Old Man’s place
- Beloved number, if multiplied by two
- Single within the boundaries of Headingley, dearie
- Picked up, like a Tiller girl who’s attractive?
- Angel‘s using drugs kept in heavy case
- Treasure one buried in hospital yard
- A little beneath one, young love
- Olympic cyclist touring Tyneside – say, that’s sweet!
- Angel backing the vintage drama
Buddy explains!

The straight part
We know that "Treasure" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case treasure = honey.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 HONEY mean?
HONEY noun- A viscous, sweet fluid produced from plant nectar by bees. Often used to sweeten tea or to spread on baked goods.
- A variety of this substance.
- Nectar.
- Something sweet or desirable.
- A term of affection.
- A woman, especially an attractive one.
- A spectrum of pale yellow to brownish-yellow colour, like that of most types of (the sweet substance) honey.
- To sweeten; to make agreeable.
- To be gentle, agreeable, or coaxing; to talk fondly; to use endearments.
- To be or become obsequiously courteous or complimentary; to fawn.
- Involving or resembling honey.
- Of a pale yellow to brownish-yellow colour, like most types of honey.