Audibly pull extremity (3)
I believe the answer is:
toe
'extremity' is the definition.
(I know that toe is a type of extremity)
'audibly pull' is the wordplay.
'audibly' shows a homophone (sound like).
'pull' becomes 'tow' (tow is a kind of pull).
'tow' is a homophone of 'TOE'.
(Other definitions for toe that I've seen before include "Drive obliquely" , "compliantly put on line" , "A foot division" , "Digit; kick" , "Pedal extremity" .)