A ROUSING rendition of a well-known Australian song is set to raise more than $110,000 for Operation Santa Claus on Christmas Eve. The Australian Association of Hong Kong has promised to donate $55,500 if Hong Kong Today presenters Kit Cumings and Hugh Chiverton launch into song with some Aussie cheer. Kit and Hugh have said they will be happy to oblige - but only if Hong Kong Today listeners phone in during the show and pledge another $55,500 to add to the total, which last night reached $1,075,927. So stand by your phones and your radios next Friday morning and tune into Radio 3 for Hong Kong's latest musical sensation. But if you thought you were going to be blasted by the strains of that old favourite Waltzing Matilda, think again because those trendy Radio 3 people have opted for Men at Work's Down Under instead. The Operation Santa Claus raffle will be drawn on Christmas Eve, giving you another good reason to tune in and find out if you are a winner. One way of getting some raffle tickets is to send a cheque for $500 (made out to Operation Santa Claus) together with your business card or name and address to Operation Santa Claus 1993, RTHK Radio 3, PO Box 70200, Kowloon. In return you will get 50 raffle tickets, which could win you a fabulous prize, including two return Connoisseur tickets to Singapore with United Airlines. If you would like to help sell raffle tickets during the coming week, contact Sally Herdman at Radio 3 on 339-6418. The special Christmas collection of Esprit is still on sale with all proceeds going to the fund. There is a cotton knit turtleneck sweater at $195, and a matching cardigan at $245. Or buy the gifts at Toppy's stores - Episode, Excursion and Jessica - for the cause of Operation Santa Claus. Donation collection boxes are also in all Body Shop, Oliver's, Esprit, and Mad Dogs outlets. Hong Kong Tramways' Victorian tram on the main line will donate all takings, with a minimum fare of $1 throughout December.