Body part: it gets rubbed up. Wait around (6,6)
I believe the answer is:
little finger
'body part' is the definition.
(little finger is a kind of body part)
'it gets rubbed up wait around' is the wordplay.
'gets' indicates putting letters inside (gets can mean captures or absorbs).
'rubbed' becomes 'felt'.
'up' says the letters should be written in reverse (in down clue: letters go upwards).
'wait' becomes 'linger' ().
'around' indicates putting letters inside.
'it' placed around 'felt' is 'ifeltt'.
'ifeltt' written backwards gives 'ttlefi'.
'ttlefi' inserted into 'linger' is 'LITTLE FINGER'.
(Other definitions for little finger that I've seen before include "Fifth digit of hand" , "Pinkie" , "Small digit" .)