Stand up and look angry (7)
I believe the answer is:
bristle
I believe this is a double definition.
'stand up' is the first definition.
(bristling is a kind of standing up)
'look angry' is the second definition.
(I've seen this before)
'and' is the link.
(Other definitions for bristle that I've seen before include "React angrily" , "Show annoyance with" , "React in an offended way" , "Short, tough piece of hair" , "Get angry" .)