If they travel south prior to outbreak of bad weather, they'll be enthusiastically received (2,4,1,5)
I believe the answer is:
go down a storm
'outbreak of bad weather they'll be enthusiastically received' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'if they travel south prior to' is the wordplay.
I cannot quite understand how this works, but
'travel' could be 'godown' (going down is a kind of travelling) and 'godown' is located in the answer.
'south' could be 's' (abbreviation) and 's' is found within the answer.
'to' is within the answer.
The remaining letters 'arm' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for go down a storm that I've seen is " get great reception".)