Showed ill-humour when broke (7)
I believe the answer is:
snapped
'broke' is the definition.
(snapping is a kind of breaking)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for snapped that I've seen before include "Broke; photographed" , "Broke sharply" , "What paparazzi did" , "Bit" , "Spoke angrily" .)