Thistle head into Sunday's William Hill Scottish Cup fourth-round tie against Aberdeen at Firhill on the back of four straight defeats in the Scottish Premiership.
Elliott says the top-flight newcomers have tried to impress with their brand of attractive football.
But he believes now is the time to start showing their ruthless streak in order to pick up some much-needed results.
The forward said: "Our results haven't been the best but we just have to stick together.
"Hopefully we can bounce back with a win and get our confidence back to the way it was when we started the league.
"The manager has been disappointed. We've been playing pretty football but that doesn't always win games.
"He kind of wants us to bring the uglier side to the football and just change the approach and be a bit more ruthless."
Partick started the season well but Christie admits they may have had the element of surprise on their side in those early encounters.
He added: "Not a lot of teams knew exactly how we played and that worked in our first few games.
"But the last few results haven't been the best and now it's time to change it."
Partick have already endured a couple of heavy defeats to Aberdeen this season.
They slumped to a 3-0 home loss in September before the Dons claimed an emphatic 4-0 victory at Pittodrie earlier this month.
And Elliott admits the Glasgow side are desperate to make amends for those results.
He said: "They have been a brilliant team and they have brilliant players all over the pitch.
"We've just got to stick together and we need to start taking our chances.
"They've hammered us in the last couple of games but we want to prove that we can beat them."
But he was adamant Partick should not dwell too much on those previous meetings with Aberdeen.
He added: "Those games are in the past. We just have to look to this game now."