(Reuters) -The Russian rouble gave up gains to weaken on Tuesday, edging away from 61 to the dollar as the finance ministry slightly eased capital controls and investor focus turned to an expected central bank rate cut later in the week. The finance ministry said export-focused companies were now allowed to transfer foreign currency to their overseas accounts under certain conditions, a move aimed at helping to pay for imports and prevent the rouble from strengthening. By 1503 GMT, the rouble was 0.2% weaker against the dollar at 61.15, giving up intra-day gains of more than 1%. It has stabili…