Possible Clues:

• It blends in tea with fruit containing tip of camomile
• Skin color changer
• Lizard that can change colour to match surroundings
• With the help of an echo, the elm may provide one with shade for a change
• Animal maintaining hue initially, then one changing?
• Lizard hard for animal to eat (wild one)
• Clean home gets makeover with one matching wallpaper?
• I easily adapt energy in tea and fruit
• Arrived outside hospital with sick lone animal
• Guevara and Trotsky enlisting American person who's changeable