Some more new rents, simply huge (7)
I believe the answer is:
monster
'simply huge' is the definition.
'monster' can be an answer for 'huge' (I've seen this before). I'm unsure of the 'simply' bit.
'some more new rents' is the wordplay.
'some more' becomes 'mo' (I can't justify this - if you can you should believe this answer much more).
'new' indicates an anagram.
'rents' with letters rearranged gives 'nster'.
'mo'+'nster'='MONSTER'
Can you help me to learn more?
(Other definitions for monster that I've seen before include "Enormous or grotesque being" , "Ogre, demon" , "Huge - beast" , "Gigantic" , "Hideous animal" .)