Guardiola supported by leading agent from the south - which seasons? (6,3)

'leading agent from the south which seasons?' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I can't see?

'guardiola supported by' is the wordplay.
I cannot quite see how this works, but
'by' could be 'per' (I've seen this in another clue) and 'per' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?