Possibly Afghan remains? Read more about that (6)
I believe the answer is:
pashto
'possibly afghan' is the definition.
'pashto' can be an answer for 'afghan' (I've seen this before). I'm not sure about the 'possibly' bit.
'remains? read more about that' is the wordplay.
'remains?' becomes 'ash' (remains of a fire).
'read more' becomes 'pto' (I can't explain this - if you can you should believe this answer much more).
'about that' means one lot of letters goes inside another.
'ash' placed into 'pto' is 'PASHTO'.
Can you help me to learn more?
(Other definitions for pashto that I've seen before include "Afghan" , "language follows!" , "Iranian language spoken in Afghanistan and Pakistan" , "hear this from Afghanistan" .)