Dis nurse in charge related to very old Greeks (8)
I believe the answer is:
hellenic
'related to very old greeks' is the definition.
I can't tell whether this defines the answer.
'dis nurse in charge' is the wordplay.
'dis nurse' becomes 'hellen' (I can't justify this - if you can you should believe this answer much more).
'in charge' becomes 'ic' (abbreviation for 'in charge').
'hellen'+'ic'='HELLENIC'
Can you help me to learn more?
(Other definitions for hellenic that I've seen before include "Of Greece and Greeks" , "Pertaining to the inhabitants of Greece" , "Greek" , "Characteristic of Greece" , "Concerning the culture of ancient Greece, as in chenille" .)