Upset at fiend showing teeth? (7)
I believe the answer is:
defiant
'upset at fiend showing teeth?' is the definition.
I can't tell whether this definition defines the answer.
'upset at fiend' is the wordplay.
'upset' indicates an anagram.
'at'+'fiend'='atfiend'
'atfiend' is an anagram of 'DEFIANT'.
Can you help me to learn more?
(Other definitions for defiant that I've seen before include "showing teeth!" , "Insubordinate" , "Mutinous" , "Uncooperative" , "Boldly resisting" .)