where in Cleveland can you xchange dollars for Eng. pounds?

Answer 1

Any large bank has a foreign exchange department and can do that for you. For example Bank of America, Wells Fargo, US Bank, Suntrust Bank, Chase Bank

Here is a link to find one near you:

http://www.switchboard.com/Banks/Cleveland/OH/19-/yellowpages.htm

Answer 2

I don't know if there is an international airport; usually airports do it. Some banks do it also.