Conceal data in space next to vault (7)
I believe the answer is:
encrypt
'conceal data' is the definition.
I can't judge whether this defines the answer.
'space next to vault' is the wordplay.
'space' becomes 'en' (in printing, a space as wide as a letter 'n').
'next to' is a charade indicator (letters next to each other).
'vault' becomes 'crypt' (I've seen this before).
'en'+'crypt'='ENCRYPT'
'in' is the link.
Can you help me to learn more?
(Other definitions for encrypt that I've seen before include "Obscure words of" , "Cipher" , "Obscure significance" , "disguise for security" , "Encipher" .)