Caroline Weir's fifth goal in her last four matches was enough to earn City all three points and take a huge step towards Champions League qualification.
The Scot was on hand to bundle home Hayley Raso's low cross after the hour, pouncing when Spurs defender Ria Percival failed to clear at the far post.
It was just rewards for Gareth Taylor's side, who had been in the ascendancy at the Hive following an evenly-matched opening 45.
City remain fifth despite the victory, but are now just two points behind Spurs with a game in hand.
Watch highlights from our WSL win over Tottenham via the video above...