Incurably snappish dog? (3)
I believe the answer is:
cur
'dog?' is the definition.
(a cur is an aggressive or scruffy dog)
'incurably snappish' is the wordplay.
'CUR' is hidden within the letters.
However, I am unsure how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for cur that I've seen before include "A worthless dog or contemptible person" , "Inferior dog or one of mixed breed" , "A low worthless dog" , "Mongrel; rascal" , "Useless dog" .)