A plot involving Ancient Greek (5)
I believe the answer is:
plato
'greek' is the definition.
(I know that Plato is a greek)
'a plot involving' is the wordplay.
'involving' indicates an anagram.
'a'+'plot'='aplot'
'aplot' anagrammed gives 'PLATO'.
'ancient' acts as a link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for plato that I've seen before include "Ancient Greek philosopher" , "Teacher of Aristotle, pupil of Socrates" , "Greek philosopher (The Republic)" , "To pal up with Greek philosopher" , "A plot (anag) (known to Aristotle?)" .)