One shows atmosphere exists over the legal profession (6)
I believe the answer is:
isobar
'one shows atmosphere' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'exists over the legal profession' is the wordplay.
'exists' becomes 'is' (if something 'is', it exists).
'over' becomes 'o' (cricket abbreviation).
'the legal profession' becomes 'bar' ('bar' can be a synonym of 'legal profession').
'is'+'o'+'bar'='ISOBAR'
Can you help me to learn more?
(Other definitions for isobar that I've seen before include "Line of equal barometric pressure on a map" , "sign of pressure" , "meteorologist's line" , "Weather map feature" , "Meteorological line joining points of equal pressure" .)