Security (7)
'security' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for custody that I've seen before include "Protective care" , "Keeping - detention" , "lock-up?" , "Charge" , "State of being under arrest" .)
'security' is the definition.
(being secure is being safe)
This is all the clue.
(Other definitions for safety that I've seen before include "Motto of the cautious!" , "The condition of being free from danger" , "shot in game" , "condition of 18 [AIRWORTHINESS]" , "immunity" .)
(Other definitions for detail that I've seen before include "Select personnel - particular - group of soldiers" , "A small or subordinate particular" , "Dilate on particulars" , "Dilate with individual item" , "Factor" .)