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Hi. I am stuck with a few clues.
67a Happen earlier than (3 - 4) - -e / -a-e
53d Seize, Sequester (3 - 4) -r- / l---
18a Dispensation (from a penalty) -a-v-r salvor ?
Many thanks in advance.

67a Pre date
18a Waiver

53d pre -empt?

Thanks for all your help.