ANTAGONIST

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KOOKABURRAThis bird sits in the old gum tree (10) BROOMSTICKWitch carrier (10) EMANCIPATEEuropean chap worried about withdrawn photo's release BEAUTYMARKEnhancing "blemish" (3x) SETTOMUSICNoted work?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