Hellish place to arrive at negative conclusion (7)
I believe the answer is:
inferno
'hellish place' is the definition.
(I've seen this in another clue)
'arrive at negative conclusion' is the wordplay.
'arrive at' becomes 'infer' (inferring is a kind of arriving at).
'negative conclusion' becomes 'no' (I can't explain this - if you can you should believe this answer much more).
'infer'+'no'='INFERNO'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for inferno that I've seen before include "Dante's work" , "Hellish poem" , "Great fire" , "Fierce fire" , "Huge conflagration" .)