Baghdad's initial caliphate developed a sort of order (10)
I believe the answer is:
alphabetic
'a sort of order' is the definition.
I can't judge whether this defines the answer.
'baghdad's initial caliphate developed' is the wordplay.
'initial' says to take the initial letters.
'developed' indicates anagramming the letters.
The initial letter of 'baghdads' is 'b'.
'b'+'caliphate'='bcaliphate'
'bcaliphate' is an anagram of 'ALPHABETIC'.
Can you help me to learn more?
(Other definitions for alphabetic that I've seen before include "with a first, etc" , "showing certain things in their natural order?" , "like characters in a demo" , "in conventional order" .)