Some vacuous blind at the end in clue for 'cloister' (7)
I believe the answer is:
seclude
'cloister' is the definition.
(thesaurus)
'some vacuous blind at the end in clue' is the wordplay.
'vacuous' says to hollow out the word (remove centre letters).
'at the end' indicates one should take the final letters.
'in' indicates putting letters inside.
'some' with its middle taken out is 'se'.
The final letter of 'blind' is 'd'.
'd' placed within 'clue' is 'clude'.
'se'+'clude'='SECLUDE'
'for' is the link.
(Other definitions for seclude that I've seen before include "Shut off" , "Keep (someone) away from other people" .)