Naive assembly that’s full of hot air? (10)
I believe the answer is:
greenhouse
'full of hot air?' is the definition.
I can't judge whether this definition defines the answer.
'naive assembly' is the wordplay.
'naive' becomes 'green' (similar in meaning).
'assembly' becomes 'house' (house is a kind of assembly).
'green'+'house'='GREENHOUSE'
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for greenhouse that I've seen before include "Glass building for rearing plants" , "see-through construction" , "A place for growing" , "associated with harmful gases" , "Horticulturalists' glass building" .)