Energy certainly seen in storm centres (4)
I believe the answer is:
eyes
'storm centres' is the definition.
(I've seen this before)
'energy certainly' is the wordplay.
'energy' becomes 'e' (physics symbol as in E=mc2).
'certainly' becomes 'yes' (both can be used to answer in the affirmative).
'e'+'yes'='EYES'
'seen in' acts as a link.
(Other definitions for eyes that I've seen before include "Potato seed-buds" , "They see and" , "Globular organs" , "They have pupils" , "Storm centres" .)