Unorthodox duty in the morning in an ancient Greek temple sanctuary (6)
I believe the answer is:
adytum
'temple sanctuary' is the definition.
(I've seen this before)
'unorthodox duty in the morning in' is the wordplay.
'unorthodox' indicates an anagram.
'in the morning' becomes 'am' (AM on a clock).
'in' indicates putting letters inside.
'duty' anagrammed gives 'dytu'.
'dytu' placed into 'am' is 'ADYTUM'.
'an ancient greek' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for adytum that I've seen before include "sacred space" , "inner sanctum" , "Temple sanctuary" , "Inner room" , "ancient sanctuary" .)