Sue fan misbehaving and dangerous (6)
I believe the answer is:
unsafe
'dangerous' is the definition.
(I know that dangerous can be written as unsafe)
'sue fan misbehaving' is the wordplay.
'misbehaving' is an anagram indicator.
'sue'+'fan'='suefan'
'suefan' with letters rearranged gives 'UNSAFE'.
'and' is the link.
(Other definitions for unsafe that I've seen before include "giving no protection" , "Dangerous, insecure" , "Precarious" , "Perilous" , "Unreliable" .)