Two clues at bottom left of the grid are foxing me: 26a Scandinavian singer is a long time going round Norway (5) A?N?? 21d Sounds like ecstasy reduced for a tenant (6) ?E???E Help appreciated.
Possibly,
Agnes Emilia Carlsson, also known mononymously as Agnes (born on 6 March 1988 in Vänersborg, Sweden), is a Swedish recording artist. She rose to fame as the winner of Idol 2005, the second season of the Swedish Idol series. She was then signed to Sony Music,
Baldric's explanation of AGNES sounds the more likely. The Abba singer was the lovely and reclusive Agneta, was she not? But, if the answer is AGNES, I don't think Tim Moorey'clue is of the quality we should expect from the Sunday Times.
ABBA was a Swedish pop group formed in Stockholm in 1972, comprising AGNETHA Fältskog, Björn Ulvaeus, Benny Andersson, and Anni-Frid Lyngstad. Wikipedia