Politician beginning to speak with queen about international organisation (7)
I believe the answer is:
senator
'politician' is the definition.
(I know that senator is a type of legislator)
'speak with queen about international organisation' is the wordplay.
'speak with' becomes 's' (I can't explain this - if you can you should believe this answer much more).
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'about' is an insertion indicator.
'international organisation' becomes 'NATO' (North Atlantic Treaty Organisation).
'er' placed around 'nato' is 'enator'.
's'+'enator'='SENATOR'
'beginning to' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for senator that I've seen before include "American politician" , "eg Bob Dole" , "Legislator -- treason (anag)" , "Governor" , "Member of the Upper House of the US Congress" .)