Room to fit astronaut's gear (9)
I believe the answer is:
spacesuit
'astronaut's gear' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'room to fit' is the wordplay.
'room' becomes 'space' (I've seen this in another clue).
'to fit' becomes 'suit' ('suit' can be a synonym of 'fit').
'space'+'suit'='SPACESUIT'
Can you help me to learn more?
(Other definitions for spacesuit that I've seen before include "Astronaut's clothing" , "- "heavenly" outfit here?" , "out-of- this-world costume?" , "Astronaut clothing" , "satellite outfit?" .)