Crossword Genius

Dictator’s summit grounds for betrayal (4,7)

Ross

I believe the answer is:

high treason

I'm a little stuck... Click here to teach me more about this clue!

'betrayal' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'dictator's summit grounds for' is the wordplay.
'dictator's summit' becomes 'hight' (I can't explain this - if you can you should believe this answer much more).
'grounds for' becomes 'reason'.
'hight'+'reason'='HIGH TREASON'

Can you help me to learn more?

(Other definitions for high treason that I've seen before include "Capital offence" , "Betrayal of one's country" , "crime against the state?" .)

I've seen this clue in the Sydney Morning Herald.
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