Vulture
/ˈvʌltʃər/
Definition 1 of 2
Pro Tip 1/3Nature's cleaner
Vulture symbolizes nature's way of cleaning by eating decomposing carcasses hence preventing spread of disease. 
Clean as a vulture means efficient natural cleaning.
Pro Tip 2/3Not always bald
Although often depicted as bald, not all vultures lack feathers on their head. 
Contrary to belief, some vulture species do have feathers atop their heads.
Pro Tip 3/3Cultural symbol
Vultures have various cultural meanings, sometimes positive as cleansers, sometimes negative as death symbols. 
In some cultures, the vulture is revered for its cleansing role in the ecosystem.