Fighting identified with crater? (6)
I believe the answer is:
boxing
'fighting' is the definition.
(boxing is a kind of fighting)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for boxing that I've seen before include "Fisticuffs" , "Fighting in a ring" , "Packer's job" , "Pugilism; a Day" , "-- Day; -- glove" .)