Part of the foot pointing East (3)
I believe the answer is:
toe
'part of the foot' is the definition.
(I know that toe is part of foot)
'pointing east' is the wordplay.
'pointing' becomes 'to' (I am not sure about this - if you are sure you should believe this answer much more).
'east' becomes 'e' (abbreviation).
'to'+'e'='TOE'
Can you help me to learn more?
(Other definitions for toe that I've seen before include "Digit on foot" , "A foot division" , "Digit; kick" , "Pedal digit" , "End of foot" .)