Geckos have sticky ones Crossword Clue

 The answer to the crossword clue "Geckos have sticky ones" is feet.

Geckos are known for their ability to climb smooth surfaces, such as walls and ceilings. This is due to the millions of tiny hairs on their feet, which are called setae. The setae have tiny hooks at the end that allow the gecko to cling to even the smallest of irregularities in a surface.

Geckos can also detach their toes from a surface if they need to, which allows them to escape from predators or to move to a new location.

Here is a fun fact: geckos can support up to 40 times their own body weight with their feet!