Short-tempered
All answers having "Short-tempered" as clue:
3 Character Answers:
RHO
4 Character Answers:
EDGY
5 Character Answers:
RATTY
TESTY
6 Character Answers:
SNIPPY
7 Character Answers:
WASPISH
9 Character Answers:
CROTCHETY
12 Character Answers:
CANTANKEROUS