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Bond dealt himself Q and seven small diamonds and AQTxx in clubs. He bid 7 Clubs, making clubs trumps, not diamonds. Drax (on Bond's right) doubled, and he redoubled.
Because Bond held AQT over Drax's KJ9, he could finesse clubs by leading from dummy and simply covering whatever card Drax played. To get to dummy, he ruffed diamonds twice (having dealt M a diamond void), which would drop Drax's AK doubleton. Once all the trumps had been drawn by finessing through Drax, then the diamonds were all winners.