Being untidily coiled will do no harm (6)
I believe the answer is:
Here is my best explanation:
'will do no harm' is the definition.
I can't judge whether this definition defines the answer.
'being untidily coiled' is the wordplay.
'coiled' can be anagrammed to 'DOCILE'.
Though, I am not clear how the anagram is indicated.
Can you help me to learn more?