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18A Do some maintenance on top of the large mansion,one hears (8) E is 3rd letter.
20A Saw that catches should (6)
22A Able to be looked upon as intelligent perception (7)
23A Discount to be returned in the price (60
Wao! Thank you so much, Scorpiojo and Rusty. That was fast. I will put those 4 answers in now and see if I can work out the Down clues. If not, I'll be back.......