Access point or spot ultimately gaining entry to China (6)
I believe the answer is:
portal
'access' is the definition.
(I know that portal is a type of entrance)
'point or spot ultimately gaining entry to china' is the wordplay.
I cannot really see how this works, but
'point' could be 'port' (port is a kind of point) and 'port' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for portal that I've seen before include "Grand sort of entrance." , "An imposing door or gate" , "An imposing gate or doorway" , "Grand and imposing entrance" , "Gate, entrance" .)