Redknapp allowed the striker to join Celtic on loan until the end of the season on Monday.
“I cannot see it being permanent. It is only a loan, until the end of the season,” said Redknapp.
“I would think that might be as far as it goes.”
“It was difficult for him not playing regularly, and he is not happy to have been out of team,” said the Spurs boss.
“Crouch and Defoe are in good form, and it can cause you problems when you have too many good players in one position.
“Robbie is not happy to sit around taking money without playing – yesterday in training, he worked hard as always, but there was a bit of a ‘Mr Angry’ to him.
“He has a great enthusiasm for the game, Celtic is his team and it was a move for him I didn’t want to stop him doing.”
