All for a mythical god (3)
I believe the answer is:
pan
'mythical god' is the definition.
'Pan' can be an answer for 'god' (Pan is an example). I am not sure about the 'mythical' bit.
'all for a' is the wordplay.
'all for' becomes 'p' (I am not sure about this - if you are sure you should believe this answer much more).
'a' becomes 'an'.
'p'+'an'='PAN'
Can you help me to learn more?
(Other definitions for pan that I've seen before include "Sweep" , "cake" , "search for gold and > god" , "Cooking vessel; forest god" , "Peter . . ., Barrie's immortal boy" .)