Notice about vicious dog in stable (6)
I believe the answer is:
secure
'stable' is the definition.
(thesaurus)
'notice about vicious dog' is the wordplay.
'notice' becomes 'see' (I've seen this before).
'about' means one lot of letters goes inside another.
'vicious dog' becomes 'cur' (I've seen this before).
'see' placed around 'cur' is 'SECURE'.
'in' is the link.
(Other definitions for secure that I've seen before include "land" , "Safe and unthreatened" , "Peg" , "Make safe or fasten" , "Safe, free from danger" .)