There would be universal hostility if it came (6,3)

'there would' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'universal hostility if it came' is the wordplay.
I cannot really see how this works, but
'universal' could be 'global' (I've seen this in another clue) and 'global' is located in the answer.
'hostility' could be 'war' (war is a kind of hostility) and 'war' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

'be' is the link.

Can you help me to learn more?