Some secateurs can scratch! (3)
I believe the answer is:
cat
'can scratch' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'some secateurs' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'CAT' is hidden within 'secateurs'.
Can you help me to learn more?
(Other definitions for cat that I've seen before include "Feline mammel" , "See 21" , "Feline - whip" , "Feline mammal" , "Tabby" .)