Changes in heat and rent are imminent (8)
I believe the answer is:
threaten
'changes in heat and rent are imminent' is the definition.
I can't tell whether this defines the answer.
'changes in heat and rent' is the wordplay.
'changes in' indicates an anagram (I've seen 'change in' mean this).
'and' is a charade indicator (letters next to each other).
'heat' put after 'rent' is 'rentheat'.
'rentheat' is an anagram of 'THREATEN'.
Can you help me to learn more?
(Other definitions for threaten that I've seen before include "Cow" , "Bully" , "State an intention to harm" , "indicate danger" , "Impend, portend" .)