Manage to contain current wreck (4)
I believe the answer is:
ruin
'wreck' is the definition.
(I've seen this in another clue)
'manage to contain current' is the wordplay.
'manage' becomes 'run' (both can mean to organise).
'to contain' means one lot of letters goes inside another.
'current' becomes 'I' (physics symbol).
'run' enclosing 'i' is 'RUIN'.
(Other definitions for ruin that I've seen before include "Destruction or bankruptcy" , "Utter destruction or downfall" , "Destroy completely" , "Physical collapse" , "Destory or bankrupt" .)