Ron fine boiling in Hell (7)
I believe the answer is:
inferno
'hell' is the definition.
(synonyms)
'ron fine boiling' is the wordplay.
'boiling' is an anagram indicator.
'ron'+'fine'='ronfine'
'ronfine' anagrammed gives 'INFERNO'.
'in' acts as a link.
(Other definitions for inferno that I've seen before include "Large dangerous fire" , "Dante's scene of horror" , "Uncontrollable fire" , "Hellish poem" , "Large uncontrolled fire" .)