The question body refers to both the shorter word and to the one with the two identical letters surrounding it.
The correct expected answer is the *long* word (i.e. the one with the twin letters attached).

-1. A tiny chirping note. 5 letters

-2. The solid oral medicament can do it. 6

-3. Develop a handgun. 8

4. First person at a musical performance. 3

-5. Set fire to the crème de la crème. 5

-6. Systematically train with a gold coin. 7

-7. Rank of the first woman. 5

-8. Poem of exaltation to a communication device. 5

-9. The British nobility visits every birthday. 6

-10. SMS from a former spouse. 4

7. level

8. Modem

Merci.

10. TexT

Hi Remi

3 - revolver

Good ones. Hi Dan.

2. tablet

9. yearly

Merci Ladies.

5. Set fire to the crème de la crème. 5 Elite

Thanks.

1. tweet

Nice one LK.

6. educate

Thanks mxm.

4. gig

The shortest one was the toughest. Merci et bonne fin de semaine.