Feature of space station bearing feature of door? (7)
I believe the answer is:
airlock
'feature of space station' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
'bearing feature of door?' is the wordplay.
'bearing' becomes 'air' (both can mean an attitude or pose).
'feature of door?' becomes 'lock' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'air'+'lock'='AIRLOCK'
Can you help me to learn more?
(Other definitions for airlock that I've seen before include "chamber?" , "Bubble obstructing flow" , "obstruction" , "plumbing problem" .)