SEMICIRCLE

CONTAGIOUSLike laughter, sometimes ENANTIOMERAwkwardly mention ear — it's one of a pair, the mirror image of the other ISLEOFDOGSReportedly, I adore residents of Battersea, part of London ALASKAROLLSushi bite topped with salmon EMANCIPATEEuropean chap worried about withdrawn photo's release DUSSELDORFEuropean city recovering from disappointment, investing not as much (10) BEAUTYMARKEnhancing "blemish" (3x) GARDENHOSEKid’s knocked over shed one rebuilt – a wind-up for the horticulturalist? (6,4) SETTOMUSICNoted work? KOOKABURRAThis bird sits in the old gum tree (10) SOMEPEOPLE"Unbelievable!" ... or what 17-, 25-, 35- and 46-Across are made from, letter-wise? BROOMSTICKWitch carrier (10) WHATISMORESaw her cavorting with 5 in addition OSTENSIBLEPretended back in Tokyo Biles managed to claim perfect scores