McClure studied privately with Joseph Iadone and, later, with Hall Overton and Don Sebesky.
Don Quixote | Don Giovanni | Don Cherry | Don | Don (honorific) | Don Cheadle | Rostov-on-Don | Don Williams | Don Juan | Don Knotts | Don Imus | Don Carlos | Don Rickles | Don Omar | Don Henley | Salesians of Don Bosco | Don Johnson | Don Drysdale | Don Pasquale | Don Messick | Don Bluth | Don King (boxing promoter) | Don King | Don Shula | Don LaFontaine | Don Cherry (jazz) | Don Burrows | Don't Look Now | Don Siegel | Don McLean |
Other associations include touring or recording with Aretha Franklin, Sting, Spike Lee, James Brown, Billy Cobham, Blood, Sweat and Tears, Philip Glass, Peter, Paul, and Mary, Don Sebesky, Sadao Watanabe, Hubert Laws, Randy Brecker, David Sanborn and Terence Blanchard.
The Royal Philharmonic Orchestra, Orchestrated and Conducted by Don Sebesky on "Black and Blue" and "A Pauper in Paradise"
Spahn was the longtime musical director and arranger for Eartha Kitt and has worked with musicians and composers including Edgar and Johnny Winter, John Pizzarelli, Carol Burnett, Frank Oz, Liza Minnelli, Galt McDermot, Gerome Ragni, James Rado, Don Sebesky, Don Pippin, Colin Romoff, Frank Loesser, Nancy LaMott, Eddie Fisher, and many others.