After figuring out each clue, you should also figure out why the clues are grouped the way they are. All answers are in English.
Group 1
- She changed after French novel (5)
- A hot underworld hiding everywhere (6,3,5)
- Upset cheaters?! (8)
- "Eh, ahoy!" - new exclamation? (2,4)
- Existing within extra livelihood (5)
Group 2
- I added tempo again (3,4,4)
- Many back in core aid assembly become streamlined (11)
- Online dating correct to lead vigil? (7,4)
- Strong good guys, according to champion in petitions (11)
- Type of tea after tea - sounds overly lengthy (3,4)
Group 3
- All in all, mortal! (5,5,3)
- Motor might first heat engine (5,7)
- Breathe! Warn his crazy one who purifies thinking? (3, 11)
- Sadly got no cliche relating to technology (11)
- Feeling nothing in no time? Weird (7)
Group 4
- Introduction complete; break out back. No pressure! (8)
- Protection club stores weapons? (6)
- Finish melting nail in iron (6)
- Copy or twin? (6)
- Views Republican fellow in polls (11)
Group 5
- Inside among elected (6)
- Handle car before exclamation (5)
- Come out on top and win well (3,5)
- Mama pig died identifying computer part (11)
- Guarantee missing right approach (7)
Bonus! Womanizer: young man going after celebrity (7)