Theatre cast finally go off for travel abroad? (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.

'theatre cast finally go off' is the wordplay.
'theatre' becomes 'globe' (I've seen this before).
'finally' indicates one should take the final letters.
'go off' becomes 'rot' (as in food going off).
The final letter of 'cast' is 't'.
'globe'+'t'+'rot'='GLOBE-TROT'

'for' acts as a link.

Can you help me to learn more?