Losing temper in the year you died (7)
I believe the answer is:
annoyed
'losing temper in the year you died' is the definition.
I can't tell whether this defines the answer.
'in the year you died' is the wordplay.
'in the year' becomes 'anno' (I've seen this before).
'you' becomes 'ye' (historical version of 'you').
'died' becomes 'd' (abbreviation next to the year of someone's death).
'anno'+'ye'+'d'='ANNOYED'
Can you help me to learn more?
(Other definitions for annoyed that I've seen before include "Irritated, peeved" , "Upset" , "'Harassed, pestered (7)'" , "Cross" , "'Irritated, impatient (7)'" .)