Danny Welbeck squandered a promising counter in the final minute as he fired into the side-netting from a tight angle on the right after being sent clear by Lacazette, but the Tynesiders pulled one back in stoppage time when Clark popped up at the back post to score with a free header.
Emery's side are now up to nine points in the league, level on points with north London rivals, Tottenham.
Following further supporter protests against the Newcastle owner Mike Ashley outside the ground prior to kick-off, Benitez's side failed to make the most of their early dominance.
And he believes the 29-year-old's unselfishness is key for Arsenal's success.
"Having to sit in the office with this guy [Ian Wright] hurt", he said.
"I don't think he could get into the Manchester City and Liverpool teams, but it would hurt Arsenal fans to see another of their superstars leave to a Premier League rival".
But instead of being offended, Wright had the ideal response to Shearer's comments.
The 28-year-old played 180 minutes for Wales against the Republic of Ireland and Denmark during the recent worldwide break and Emery thinks Ramsey is just feeling the effects of playing too much for his country.
"The result gives us confidence but the things on the pitch, individually and collectively, that we can improve", he said, per Sky Sports.
"I want not only for him to assist we need him to go in the box and score more goals like today, " Emery explained according to Express UK.
Arsenal looked disjointed and at sea in the first half, but took control when Torreira came on.
Guendouzi played very safely and can not be criticised for his performance as he hardly made any mistakes, but Torreira is more aggressive and forward looking and even had a couple of shots on goal.
"Every player works, not only the attacking players but also the midfielders and the centre-backs at set pieces".
On rotating for the Europa League and starting Leno, Emery said: "Yes, normally we are going to change and use a lot of players for different competitions".