Hi again P. No way, can I see how the 'L' would go in (from the clue). Now if the clue read
Passed English having slipped behind - E + LAPSED, I'd 'buy' Dot's ADDLE which is, indeed, EMPTY in Chambers.
But the clue doesn't read as I'd like it to.And, even though the Saga setter can be very tricke, his/her answers are always fully 'explainable'. I still can't see a close to reasonable explanation for AISLE
Tonyw, where are you?