Take home crystal (5)
I believe the answer is:
clear
This clue is a double definition.
'take home' is the first definition.
(I've seen this in another clue)
'crystal' is the second definition.
(thesaurus)
(Other definitions for clear that I've seen before include "Lucid, transparent" , "bound over" , "negotiate" , "Transparent or cloudless" , "beyond doubt" .)