Nature god initially got hunger reminder (4)
I believe the answer is:
pang
'hunger reminder' is the definition.
(I've seen this in another clue)
'nature god initially got' is the wordplay.
'nature god' becomes 'Pan' (Pan is a god in Greek mythology).
'initially' indicates taking the first letters.
The first letter of 'got' is 'g'.
'pan'+'g'='PANG'
(Other definitions for pang that I've seen before include "Short violent pain" , "Sharp spasm of pain" , "Sharp twinge of pain" , "Sudden feeling of pain or conscience" , "Stab of pain" .)