They won't let one pass out, presumably, at home (7)
I believe the answer is:
indoors
'home' is the definition.
(I've seen this before)
'they won't let one pass out presumably' is the wordplay.
I cannot quite understand how this works, but
'one' could be 'i' (Roman numeral) and 'i' is located in the answer.
'pass' could be 'do' (doing is a kind of passing) and 'do' is found in the answer.
The remaining letters 'nors' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'at' is the link.
Can you help me to learn more?
(Other definitions for indoors that I've seen before include "With a roof over one's head?" , "Having returned to pavilion" , "Within a building" , "Covered" , "under cover" .)