Halt: ice broken; a moral problem (7)
I believe the answer is:
ethical
'halt ice broken a moral problem' is the definition.
I can't judge whether this definition defines the answer.
'halt ice broken' is the wordplay.
'broken' indicates an anagram.
'halt'+'ice'='haltice'
'haltice' with letters rearranged gives 'ETHICAL'.
Can you help me to learn more?
(Other definitions for ethical that I've seen before include "Morally acceptable" , "In accordance with approved moral standards" , "Moral, honest" , "not advertised to the general public" , "At Chile (anag.)" .)