Gagged, being very emotional (6)
I believe the answer is:
choked
'gagged' is the definition.
('choke' can be a synonym of 'gag')
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for choked that I've seen before include "Disappointed; upset" , "Throttled, strangled" , "Asphyxiated, gagged" .)