Concrete Belgian mixed after last of cement (8)
I believe the answer is:
tangible
'concrete' is the definition.
(associated in meaning)
'belgian mixed after last of cement' is the wordplay.
'mixed' is an anagram indicator.
'after' means one lot of letters go next to another.
'last of' indicates one should take the final letters.
The final letter of 'cement' is 't'.
'belgian' with letters rearranged gives 'angible'.
'angible' put after 't' is 'TANGIBLE'.
(Other definitions for tangible that I've seen before include "Solid, can be touched" , "Able to be perceived by touch" , "asset" , "Actual" , "Touchable, real" .)