Safe (6)

'safe' is the definition.
(I know that safe can be written as secure)
This is all the clue.
(Other definitions for secure that I've seen before include "Incapable of being tampered with" , "Make safe or fasten" , "Peg" , "properly restrained" , "Free from danger or risk" .)
'safe' is the definition.
(I know that safe can be written as strongbox)
This is all the clue.
(Other definitions for strongbox that I've seen before include "security device at museum?" , "Store for valuables" , "Safe" , "Container for valuables" .)
'safe' is the definition.
(I've seen this before)
This is all the clue.