Action station? (12)
I believe the answer is:
battleground
'action station?' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'action station?' is the wordplay.
'action' becomes 'battle' (military action).
'station?' becomes 'ground' (I can't explain this - if you can you should give a lot more credence to this answer).
'battle'+'ground'='BATTLEGROUND'
Can you help me to learn more?
(Other definitions for battleground that I've seen before include "where action has taken place" , "Area of conflict" , "arena" , "scene of conflict" , "Army hospital near here perhaps" .)