Weeekend Ft

[HenHen]

17d - call to incarcerate a greater number lifted, response triggered on one's release (9) - P????????
21ac - relative arranged to come back to see French city (6) - ??N???
21d - herb claimin' to be upset (7) - ??G????
27ac - sword put down, first of many to pierce heart (8) - ????????
29ac - anonymous as 28 across (8) - ???????? (28 across is no side)

Help appreciated with explanations
Thanks
HenHen

[Oldred]

21a Nantes

[Mamyalynne]

Pheromone

Nantes

Nigella

Claymore

Nameless

[Mamyalynne]

sorry
Pheromone - more (back) in Phone

Nantes - set + Nan (back)

Nigella - Allegin' (back)

Claymore - Lay + M in Core

Nameless- literal clue

[HenHen]

many thanks to you both.

[Mamyalynne]

You're welcome

[HenHen]

sorry , one more, last one!
22d - little green men a fabrication with naturally square heads (6) - ?E?E?S

[Mamyalynne]

Aliens

[Mamyalynne]

Seoul to give the 'L'

[Mamyalynne]

a Lie + N(aturally) S(quare)

[HenHen]

Thanks again. Don't know how I'd ever get these finished without you, Mamyalynne!!!

[Mamyalynne]

Only one of a team.: -)