Children keeping dog brought to safety (7)
I believe the answer is:
secured
'brought to safety' is the definition.
'children keeping dog' is the wordplay.
'children' becomes 'seed' (I've seen this before).
'keeping' is an insertion indicator.
'dog' becomes 'cur' (cur is a kind of dog).
'seed' enclosing 'cur' is 'SECURED'.
(Other definitions for secured that I've seen before include "Got by special effort" , "Protected" , "Obtained" , "Tethered" , "all tied up?" .)