The most common and most likely answer to this crossword clue is the 6 letter word ENDEAR
I've seen this crossword clue in The Guardian
E
N
D
E
A
R
More clues leading to the result ENDEAR
- Make desired halt at attention
- Make popular organ stop at first
- Make attractive finish to a queen’s clothing
- Make more attractive posterior: lop off slice at first, then swap sides
- Draw in boundary, one cut off by post-impressionist
- Cause to be loved, showing close attention
- Dispatch clothing ? no tops, please
- Win earned fraudulently
- “Be charming every now and again” penned le Carré
- Please destroy organ
Buddy explains!

The straight part
We know that "Win" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case win = endear.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 ENDEAR mean?
ENDEAR verb- To make (something) more precious or valuable.
- To make (something) more expensive; to increase the cost of.
- To stress (something) as important; to exaggerate.
- To make (someone) dear or precious.