Erupt suddenly on holiday abroad? (5,3)
I believe the answer is:
break out
'erupt suddenly' is the definition.
'break out' can be an answer for 'erupt' (synonyms). I am unsure of the 'suddenly' bit.
'on holiday abroad?' is the wordplay.
'on' says to put letters next to each other.
'holiday' becomes 'break' (break can mean a holiday or time off).
'abroad?' becomes 'out' (abroad can mean away or out).
'break' next to 'out' is 'BREAK-OUT'.
Can you help me to learn more?
(Other definitions for break out that I've seen before include "Appear suddenly - escape" , "Escape from jail" , "Start suddenly; escape (from prison)" .)