Fourteen Definitions

These definitions seem to be missing something... can you fill them in?

Made for the Confounding Calendar 2025.

Supports keyboard and mouse. Left/right to move between letters, up/down to move between clues, backspace/delete to delete a letter.

Some of these will be a bit more tricky, so feel free to search anything for this puzzle!

Hints:

FAMOUS INDIAN LEADER

You probably know the answer, but you're probably wondering where you're supposed to place this. Perhaps you're also wondering how to fill those unfinished clues...

HANDHELD PERCUSSION INSTRUMENT

It comes in pairs for clapping together.

REPLACES URACIL IN DNA

DNA has the letters A, C, G, T, and this is the one represented by "T".

C# OR F#, SAY

It'll be useful to think of a piano.

EASTER, EG

Don't think about Easter eggs; Easter is an example of this.

Still stuck?

The date of Easter changes a lot, but one thing always stays the same...

(X^N)' = NX^(N-1)

If you don't know calculus that well, you might be able to guess the answer if you know what the "^" operation is called.

MAIN STORY?

To fulfill this definition, don't center your guesses on narratives or recounts; that's not the "story" you should be thinking of.

Still stuck?

Some of you might have noticed that I use the spellings "fulfill" and "center", rather than "fulfil" and "centre". Have you noticed that I also use "story" instead of "storey"?