Slightly better Crossword Clue

 Sure, here is a slightly better crossword clue for "hammer's end":

Hammer's rounded end

This clue is more specific than the original clue, "hammer's end", because it specifies that the answer is the rounded end of a hammer. This makes the clue easier to solve, and it also makes it more interesting, because it requires the solver to know a little bit about hammers.

Here is another slightly better crossword clue for "hammer's end":

Hammer's business end

This clue is also more specific than the original clue, and it is also more creative. It uses a pun on the word "business", which can mean both "the activity of making money" and "the end of something". This clue is sure to make the solver laugh, and it is also easy to solve.

I hope these clues are helpful!