He rates sport wrongly — it's way above us! (12)
I believe the answer is:
stratosphere
'he rates sport wrongly it's way above us' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'he rates sport wrongly' is the wordplay.
'wrongly' is an anagram indicator.
'he'+'rates'+'sport'='heratessport'
'heratessport' anagrammed gives 'STRATOSPHERE'.
Can you help me to learn more?
(Other definitions for stratosphere that I've seen before include "Layer of high air around the earth" , "Region about ten to fifty km above the earth" , "High level above earth" , "Atmospheric layer" , "Area containing ozone layer" .)