Bellybutton (5)
I believe the answer is:
navel
'bellybutton' is the definition.
(synonyms)
This is all the clue.
(Other definitions for navel that I've seen before include "Scar on the stomach (for gazing at?)" , "Part of body; sort of orange" , "Belly button" , "Where the umbilical cord was once attached" , "Target of gaze" .)