Broke out old royal at university lecture series (7)
I believe the answer is:
erupted
'broke out' is the definition.
('erupt' can be a synonym of 'break out')
'old royal at university lecture series' is the wordplay.
'old royal' becomes 'ER' (Elizabeth Regina ie Queen Elizabeth).
'at university' becomes 'up' (slang term meaning at university).
'lecture series' becomes 'ted' (I can't justify this - if you can you should believe this answer much more).
'er'+'up'+'ted'='ERUPTED'
Can you help me to learn more?
(Other definitions for erupted that I've seen before include "Blew up like volcano" , "Broke out (like Etna)" , "Broke out suddenly" , "Blew up or out as volcano may" .)