Each time you fulfill an Export contract which gives you Hops, you can immediately produce 1 Beer for each unit of Hops imported at the cost of 1 Grain each. For each unit of Beer produced, you receive £9*
You can produce max. 3 beer per contract. Thus, you can gain at maximum £27 from your clan ability per Export contract. You can choose to brew beer before or after taking any Direct export bonuses.
You can perform the free expansion either before or after you convert the grain into beer as per the Clan ability.