Strongly criticise nature god (3)
I believe the answer is:
pan
This could be a double definition.
'strongly criticise' is the first definition.
'pan' can be an answer for 'criticise' (informal term meaning to criticise heavily). I am unsure of the 'strongly' bit.
'nature god' is the second definition.
(Pan is a god in Greek mythology)
Can you help me to learn more?
(Other definitions for pan that I've seen before include "Toilet bowl" , "Wash gravel" , "Swing" , "Greek woodland god" , "A vessel; criticise strongly" .)