Colloquial "sticking" point (4)
I believe the answer is:
craw
'colloquial sticking point' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for craw that I've seen before include "Bird's pouch for storing food" , "Crop the unacceptable sticks in" , "Crop of a bird" , "throat" , "Stomach of an animal" .)