Ummm.. no, clone is clone.. an exact copy.
You might get some joy out of Ultramon. Never tried it myself so just a guess.
If in that situation myself I'd just make two presets, one with the TV as a single monitor and one with your 19" as a single monitor. If it boots to the wrong monitor just use the preset to switch and away you go.
#1: Phenom II C2 955BE @ 3.6, Antec Kuhler 920, Gigabyte GA-MA790FX-DS5, Asus 5870/V2, ASUS Xonar D2X, 4 x 1gig OCZ2N1066SR2GK @800, Antec Truepower New 750, Arc Midi, Win8pro x64 upgrade
#2: Athlon 64 X2 4200+, AGP 1950pro, Audigy 2, Asus A8V-D, 2gig ram, Enermax 465P, Antec900. Now on Win8pro cat 10.2