Be upset when trapped by girlfriend in argument (6)
I believe the answer is:
debate
'argument' is the definition.
(synonyms)
'be upset when trapped by girlfriend' is the wordplay.
'be upset when' becomes 'eb' (I can't justify this - if you can you should believe this answer much more).
'trapped by' indicates putting letters inside.
'girlfriend' becomes 'date' (date can mean someone you are dating).
'eb' going within 'date' is 'DEBATE'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for debate that I've seen before include "Discuss through argument" , "Public argument" , "Discuss; argue" , "Formal public discussion" , "Hold public discussion about" .)