Inspection seems to add redoubled energy (4,3)
I believe the answer is:
look see
'inspection' is the definition.
(I've seen this before)
'seems to add redoubled energy' is the wordplay.
'seems' becomes 'looks' ('look' can be a synonym of 'seem').
'to add' means one lot of letters go next to another.
'redoubled energy' becomes 'ee' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'looks'+'ee'='LOOK-SEE'
Can you help me to learn more?
(Other definitions for look see that I've seen before include "gander" , "Examination" , "survey?" , "Butcher" , "check" .)