Help with these Xwords clues?

[Billy_Bonka]

Thanks in advance.

1- Antelope in one pen to the west (5) O?I??
2- Volunteers to bring in nerve gas for empress (7)
T?A???A
3- Old service held in small room in a New York university (7) C?R???L
4- One admired bird with no tail (4) ???O
5- Evening out with dish - make mistake going home temporarily (4-1-5) ?I?D - ? - ????E
6- Innocent facing arrest for sort of crime (5-6)
W?I?? / ?O?L??
7- Dealing with organisation of pub, meaning one is in it (10) ?O?I???C?L
8- Show contempt for the reportedly bamboozled in the area (8)

[kettledrum]

2. Tsarina ... sarin (nerve gas) in TA (Territorial Army)

[slaney]

4.Hero(n)

[kettledrum]

4. Hero .... hero(n)
5. pied-a- terre .... pie + date + err
6. white collar

[novalis]

3 cornell
4 - hero
5 - pied a terre
6 - white collar
7- logistical
1 could be oribi

[kettledrum]

7. logistical .... local round gist + 1
8. district .... diss + tricked

[kettledrum]

yes, Novalis. oribi << 1 biro

[wired]

7. LO gist i CAL

[Billy_Bonka]

Thanks folks!