What's regularly placed in current container (3)
I believe the answer is:
urn
'container' is the definition.
(I know that urn is a container)
'what's regularly placed in current' is the wordplay.
'what's regularly placed in' means one should take alternating letters.
The alternate letters of 'current' are 'URN'.
(Other definitions for urn that I've seen before include "Tall vase with stem" , "Large ornamental vase" , "Pitcher" , "Ossuary" , "A large vase, perhaps for holding ashes" .)