Greek building standard so concerning (9)
I believe the answer is:
parthenon
'greek building' is the definition.
'Parthenon' can be an answer for 'building' (Parthenon is an example). I am unsure of the 'greek' bit.
'standard so concerning' is the wordplay.
'standard' becomes 'par' (standard of play in golf).
'so' becomes 'then' (I've seen this in another clue).
'concerning' becomes 'on' (both can mean 'in relation to').
'par'+'then'+'on'='PARTHENON'
Can you help me to learn more?
(Other definitions for parthenon that I've seen before include "Temple on the Athenian Acropolis" , "Temple of Athene on Acropolis in Athens" , "ruined Greek temple" , "Ancient temple" , "Tourist attraction of Athens" .)