Cryptic

[marjessica]

Well if most of my answers are correct - I thank you all for helping me solve cryptic. However,I'm still stuck on a few to finish off!

rank punctuation mark using help centre (7)

c-l-n-l

Shape produced by ballpoint with label on (8)

-e-c-g-n

article uses different Greek hero (7)

T-e-e-s

A small department is very skilled (5) 

a-e-- is that adept?

[Tilly2]

1 colonel

[Hazlinny]

1. Colonel   colon + el (middle of help)

[Tilly2]

3 Theseus

[Canary42]

Theseus

[Tilly2]

2 pentagon

[Davemano]

1 colon(help)  colonel

2  Pen tag on 

[Tilly2]

4 adept

[thestath]

Pentagon 

Adept 

[marjessica]

Thankyou for all your help

 all correct x