The former England international winger was included in Spurs' 25-man Premier League squad list but has been allowed to link up with the Russian side for four months
The winger had been included in Andre Villas-Boas' 25-man Premier League squad list for the first half of the season but has nevertheless been permitted to leave the club, with first-team football at White Hart Lane apparently unlikely.
Since joining Spurs for £15 million in July 2008, the 28-year-old has only made 62 competitive appearances for his side over four years.
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Bentley had previously been loaned out to Birmingham City and West Ham United while on the books at White Hart Lane but without holding down a first-team place at either club.