Possible Clues:

• Toronto loc
• Neighbour of Man
• Prov. at one end of the Ambassador Bridge
• Fort Erie's prov.
• Trillium Prov
• Southernmost Canadian prov
• Quebec neighbor: abbr.
• Can.'s southernmost point is in it
• One side of Niagara Falls: Abbr
• Prov. on Niagara Falls