Festival diagrams organised, with involvement of rector initially (5,4)
I believe the answer is:
mardi gras
'festival' is the definition.
(Mardi Gras is an example)
'diagrams organised with involvement of rector initially' is the wordplay.
I cannot quite see how this works, but
'rector' could be 'r' and 'r' is found within the answer.
an anagram of 'diagrams' is 'madigras' which is located in the left over letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for mardi gras that I've seen before include "festive occasion" , "Day for 9 acrosses" , "pre-Lent festival" , "Shrove Tuesday celebration" , "Shrove Tuesday festival" .)