ZEROTOHERO

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 ALASKAROLLSushi bite topped with salmon EMANCIPATEEuropean chap worried about withdrawn photo's release DUSSELDORFEuropean city recovering from disappointment, investing not as much (10) GARDENHOSEKid’s knocked over shed one rebuilt – a wind-up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