Splice tail off fish, deboning entire strip in seconds (7)

I believe the answer is:

percent

I'm a little stuck... Click here to teach me more about this clue!

'splice' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

I don't understand the rest of the clue.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.