Travel abroad, try banking large bet then perish (5-4)

'travel abroad' is the definition.
'globe-trot' can be an answer for 'travel' (globe-troting is a kind of travelling). I am unsure of the 'abroad' bit.

'try banking large bet then perish' is the wordplay.
'try' becomes 'go' (both can mean an attempt).
'banking' means one lot of letters goes inside another.
'large' becomes 'L' (eg in clothes sizes).
'then' means one lot of letters go next to another.
'perish' becomes 'rot' (I can't explain this - if you can you should give a lot more credence to this answer).
'go' placed around 'l' is 'glo'.
'glo'+'bet'+'rot'='GLOBE-TROT'

Can you help me to learn more?