Annoyance as succession interrupted by king (7)
I believe the answer is:
chagrin
'annoyance' is the definition.
(I've seen this before)
'succession interrupted by king' is the wordplay.
'succession' becomes 'chain' (I've seen this before).
'interrupted by' is an insertion indicator.
'king' becomes 'gr'.
'chain' placed around 'gr' is 'CHAGRIN'.
'as' is the link.
(Other definitions for chagrin that I've seen before include "Shame at having failed" , "Feeling of annoyance and disappointment" , "Discomfiture" , "Frustration at having failed" , "Humiliation, mortification" .)