Area where things are growing heated (6)
I believe the answer is:
hotbed
'area' is the definition.
(hotbed is a kind of area)
'things are growing heated' is the wordplay.
I cannot really see how this works, but
'heated' could be 'hot' (similar in meaning) and 'hot' is found within the answer.
The remaining letters 'bed' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'where' acts as a link.
Can you help me to learn more?
(Other definitions for hotbed that I've seen before include "Place with ideal conditions for rapid growth" , "Place with ideal conditions for development" , "vicious place" , "Breeding ground" , "Scene of rapid growth, as of intrigue" .)