The most common and most likely answer to this crossword clue is the 7 letter word FRETSAW
I've seen this crossword clue in The Times
F
R
E
T
S
A
W
More clues leading to the result FRETSAW
- Agonises over wife cut by a carpentry tool
- Fighter plane, one blowing up cutter
- Worry, saying: “That will make a fine cut”
- Fine good-for-nothing comes up with delicate tool
- Woodcutter‘s anxiety understood
- Cutter was returning after mist at sea
- Tool was returned after unnecessary worry
- Female with useless fellow, flipping tool
- Regular occupants of farm refuse to return tool
- Father returned superfluous tool
Buddy explains!

The straight part
We know that "carpentry tool" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case carpentry tool = fretsaw.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 FRETSAW mean?
FRETSAW noun- A saw consisting of a metal frame having a fine-toothed narrow blade held under tension, used in making curved cuts.
- To cut with a fretsaw.