Angry when the chap broke a date (6)
I believe the answer is:
heated
'angry' is the definition.
(I've seen this in another clue)
'the chap broke a date' is the wordplay.
'the chap' becomes 'he' ().
'broke' indicates anagramming the letters.
'date' with letters rearranged gives 'ated'.
'he'+'ated'='HEATED'
'when' is the link.
(Other definitions for heated that I've seen before include "Angry, getting warm" , "Inflamed with passion" , "fired" , "Made warm" , "Fired-up" .)