* Yen off lows after USD/JPY fails to clear 100. * Downtrend still intact for Japanese currency. * Aussie knocked lower, eyes on China PMI report. The U.S. dollar was nursing a grudge in early Asian trade on Tuesday after another attempt at 100 yen failed due to options-related offers, but traders suspect it is only a matter of time before the psychological level is broken. The greenback bought 99.35 yen, little changed from late New York levels but down from Monday's high near 99.90. Traders said there is demand to buy dollar/yen on dips and a clear break above 100 will pave the way for a retest of the April 2009 ... (full story)