MAINSTREAM

AUTHORSHIPWriting this, hour wasted filling a puzzle at the beginning (10) THATDOESIT"Enough already!" ZZZZFUYWUYBear of children's rhyme MEMORYLANETake a nostalgic trip down this (6,4) CEREBRATEDThought before entering bet, card getting dealt (10) MINDTHEGAPWarning on exiting tube train (4,3,3) STRIPPOKERCard game that's really taking off? ZZBUALDRINAstronaut for whom a Pixar character is named SUPERWOMANShe flies American back every week to country (10) BIGBROTHERUbiquitous leader is great alongside fellow union member (3,7) HIGHSTAKESWith a lot on the line, or a phonetic hint to 3-, 8-, 15-, and 23-Down MAGNACARTADocument sealed at Runnymede in 1215 (5,5) METHUSELAHBiblical patriarch – bottle holding six litres of wine (10) DUSSELDORFEuropean city recovering from disappointment, investing not as much (10)