A lingo developed after lesson for district (8)
I believe the answer is:
regional
'for district' is the definition.
(for or relating to a particular district or region)
'a lingo developed after lesson' is the wordplay.
'developed' indicates an anagram.
'after' means one lot of letters go next to another.
'lesson' becomes 're' (I can't justify this - if you can you should believe this answer much more).
'a'+'lingo'='alingo'
'alingo' anagrammed gives 'gional'.
'gional' put after 're' is 'REGIONAL'.
Can you help me to learn more?
(Other definitions for regional that I've seen before include "Relating to a particular area" , "Relating to local area" , "Relating to one area" , "Characteristic of an area" , "Like some food" .)