Safety feature could be bargain? Almost (3,3)
I believe the answer is:
air bag
'safety feature' is the definition.
'could be bargain? almost' is the wordplay.
'could be' indicates anagramming the letters.
'almost' means to remove the last letter (most of the word but not all of it).
'bargain' with its last letter removed is 'bargai'.
'bargai' with letters rearranged gives 'AIR BAG'.
(Other definitions for air bag that I've seen before include "A safety feature in a car" , "Inflatable safety device in car" , "Rapidly-inflating car safety device" , "Safety device in a motor car" , "Balloon or protective device in car" .)