Agbonlahor has a greater responsibility on his shoulders now that Bent is sidelined for the remainder of the campaign with ankle ligament damage.
But McLeish believes it is vital Villa look to find the net from all areas of the team as they look to repeat last season's Barclays Premier League win at the Emirates Stadium.
McLeish said: "You can't keep singling out one guy in Gabby to get you the goals. We need other guys to score as well. We need to score from set pieces, we've not done that very well this season.
"We are looking for Gabby to get amongst the goals - but he is also a provider and his assists this season been excellent as well."