LOSTCAUSES

KOOKABURRAThis bird sits in the old gum tree (10) DUSSELDORFEuropean city recovering from disappointment, investing not as much (10) CONTAGIOUSLike laughter, sometimes SOMEPEOPLE"Unbelievable!" ... or what 17-, 25-, 35- and 46-Across are made from, letter-wise? ISLEOFDOGSReportedly, I adore residents of Battersea, part of London ENANTIOMERAwkwardly mention ear — it's one of a pair, the mirror image of the other ALASKAROLLSushi bite topped with salmon BROOMSTICKWitch carrier (10) BEAUTYMARKEnhancing "blemish" (3x) EMANCIPATEEuropean chap worried about withdrawn photo's release SETTOMUSICNoted work? GARDENHOSEKid’s knocked over shed one rebuilt – a wind-up for the horticulturalist? (6,4) TWITTERINGSound of birds on social media? (10) FLEURDELISEngineer used filler for heraldic design (5-2-3)