That is actually easy if they put an intermediary club, maybe Pozzo's family club like Watford
Inter sell to Watford, then Watford loan him to Benfica for 2.5m per year with obligation for 5m (total 7.5m)
Then Inter take 1 youngster from Udinese valued around 5 to 7.5million as their payment
No loopholes, everything will seen like normal transfer activity