Martin's part of Birmingham? (5)

I believe the answer is:

aston

I'm a little stuck... Click here to teach me more about this clue!

'part of birmingham?' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for aston that I've seen before include "- Villa, football club" , "Premiership FC" , "part of Birmingham" , "Area of Birmingham" , "and 20: Midlands football club" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app