The 20-year-old scored his final goal for Oldham in a 2-0 win at Doncaster Rovers on August 30 and two days later completed a switch to Rotherham United for a club record £400,000 fee.
Harris showed glimpses of his power and pace that late summer’s day and now Dickov is banking on those characteristics, allied to his appetite to do well, to provide Rovers with a potent weapon in their play-off quest.
On Clarke-Harris, who has joined on a youth loan for the rest of the season, filling the gap after Uche Ikpeazu requested an early return to Watford, Dickov said: “He caused us all sorts of problems earlier on in the season for Oldham.
“We are really pleased to have him and he will be a big asset for us. He will compliment all the other strikers we have got; he will run the channels and is very quick and strong and the one thing he does on a regular basis is hit the target.”
On the early exit of Ikpeazu, he added: “He is well within his rights to do that, he thought he was going to come here and play.
“You want players to fight for the shirt and from that aspect, it was disappointing.
“But we are delighted to sign Jonson.”
Rovers will be watched by a bumper crowd today, due to a cut-price ticket offer, and they face yet another form side in Peterborough, who will be roared on by 2,000 visiting fans.
But Dickov is certainly not cowed, added: “It seems every game we have played recently has been against a form team.
“Peterborough have won their past three games but we have shown we are difficult to beat and can play well and pick up the points.”