Egyptians resumed voting Wednesday in a constitutional referendum, with turnout expected to hold the key to a likely presidential bid by army chief Abdel Fattah al-Sisi after clashes killed nine the previous day, AFP reported.In the capital Cairo, early turnout was lacklustre on the second day of the vote, an Agence France Presse journalist said, with a trickle of Egyptians heading to polling stations in the morning.Polling had gone ahead smoothly amid tight security at most stations across Egypt on Tuesday, but sporadic clashes between supporters of ousted president Mohamed Morsi and their opponents and police left at least nine dead. The constitution, which replaces the one passed under Morsi, is expected to be approved despite a boycott by his Islamist supporters in the Muslim Brotherhood.The charter adopted under Morsi was approved with 64 percent of the vote, but just 33 percent of the country's 53 million voters turned out.