The former Spurs man made his prediction following the Magpies’ 2-1 defeat to Watford at St. James’ Park in the Premier League on Saturday afternoon.
The defeat means that Newcastle are second from bottom in the league table with just two points from six matches.
Crooks, who was on the books of Tottenham from 1980 to 1985, believes that McClaren’s job is in danger.
“The more Watford go on and play the way they did today, the more they will gain belief,” the 57-year-old said on BBC Final Score. “Newcastle lacked belief, ability and confidence, and Steve McClaren is struggling to inject it.
“The way things are going, McClaren could be out of a job come Christmas. The expectation at St James' Park is sky-high.
"Can he match that expectation? I doubt it. The fans need to see something, effort at least.”
While many will suggest that Crooks is thinking too far ahead, the reality is that if Newcastle’s results do not improve in the coming weeks, then McClaren’s job will come under threat.
The Magpies are struggling to score goals and are vulnerable at the back as well, while the midfield is not creating as many chances as it should.