HEADSTRONG

MINDTHEGAPWarning on exiting tube train (4,3,3) HIGHSTAKESWith a lot on the line, or a phonetic hint to 3-, 8-, 15-, and 23-Down SUPERWOMANShe flies American back every week to country (10) BIGBROTHERUbiquitous leader is great alongside fellow union member (3,7) MAGNACARTADocument sealed at Runnymede in 1215 (5,5) METHUSELAHBiblical patriarch – bottle holding six litres of wine (10) MEMORYLANETake a nostalgic trip down this (6,4) ZZZZFUYWUYBear of children's rhyme THATDOESIT"Enough already!" CEREBRATEDThought before entering bet, card getting dealt (10) STRIPPOKERCard game that's really taking off? AUTHORSHIPWriting this, hour wasted filling a puzzle at the beginning (10) ZZBUALDRINAstronaut for whom a Pixar character is named INGRATIATEInsinuate