The most common and most likely answer to this crossword clue is the 6 letter word ENDOWS
I've seen this crossword clue in The Guardian
E
N
D
O
W
S
More clues leading to the result ENDOWS
- Stops to collect Oscar with awards
- Funds one extremely dangerous weapon’s first outing
- Four card players wrapping party gifts
- Is a donor complete, given love directions?
- Gives lots of directions about party
- Short private parts, runs out and leaves
- Rent essentially provided by American economist with school grants
- Grant's purpose that hurts South
- Finishes with zero wickets and leaves
Buddy explains!

The straight part
We know that "Is a donor/Is a donor" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case is a donor/is a donor = endows.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 ENDOWS mean?
ENDOWS verb- To provide with a dower or a dowry.
- To give property to (someone) as a gift; specifically, to provide (a person or institution) with support in the form of a permanent fund of money or other benefits.
- Followed by with, or rarely by of: to enrich or furnish with some faculty or quality.
- Usually in the passive: to naturally furnish (with something).