What does the cryptic crossword clue "Opposite of belligerence characteristic of copper? (3-10)" mean?

The definition is "Opposite of belligerence". The wordplay uses a double definition. Double definition The answer is NONRESISTANCE.

Opposite of belligerence characteristic of copper? (3-10)

Guardian Cryptic #29012 | 8 Down | 2023-03-08 flower