Her Majesty comes back with something boring or something infuriating (3,3)
I believe the answer is:
red rag
'something infuriating' is the definition.
I can't tell whether this definition defines the answer.
'her majesty comes back with something boring' is the wordplay.
'her majesty' becomes 'ER' (Elizabeth Regina).
'comes back' says the letters should be written in reverse.
'with' is a charade indicator (letters next to each other).
'something boring' becomes 'drag' (I've seen this in another clue).
'er' back-to-front is 're'.
're'+'drag'='RED RAG'
'or' acts as a link.
Can you help me to learn more?
(Other definitions for red rag that I've seen before include "Provocation to bull" , "Something proverbially annoying a bull" , "Bull incitor?" , "Reputed to annoy bull" , "Source of extreme provocation" .)