Steer contemporary flow of power (6,7)
I believe the answer is:
direct current
'power' is the definition.
(direct current is a kind of power)
'steer contemporary flow' is the wordplay.
'steer' becomes 'direct' (synonyms).
'contemporary flow' becomes 'current' (synonyms. I am not sure about the 'contemporary' bit.).
'direct'+'current'='DIRECT CURRENT'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for direct current that I've seen before include "DC in full" , "Electrical flow in one direction only" , "Electricity flow from, eg, battery" , "potentially shocking!" , "Electricity flowing in one direction only" .)