Ceiling is on fire, I'm stuck inside (5)
I believe the answer is:
limit
'ceiling' is the definition.
(I've seen this in another clue)
'on fire i'm stuck inside' is the wordplay.
'on fire' becomes 'lit' (I've seen this in another clue).
'i'm stuck' becomes 'im' (I can't justify this - if you can you should give a lot more credence to this answer).
'inside' is an insertion indicator.
'lit' placed around 'im' is 'LIMIT'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for limit that I've seen before include "Boundary or maximum" , "verge" , "maximum number" , "Confine within bounds" , "Frontier" .)