Cruelly slash site bid and deprive of official support (12)
I believe the answer is:
disestablish
'deprive of official support' is the definition.
I can't judge whether this defines the answer.
'cruelly slash site bid' is the wordplay.
'cruelly' indicates anagramming the letters (I've seen this in other clues).
'slash'+'site'+'bid'='slashsitebid'
'slashsitebid' with letters rearranged gives 'DISESTABLISH'.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for disestablish that I've seen before include "Make unofficial" , "keep church separate" .)