The age for power production (10)
I believe the answer is:
generation
This clue could be a double definition.
'the age' is the first definition.
(thesaurus)
'power production' is the second definition.
'generation' can be an answer for 'production' (I've seen this before). I'm not sure about the 'power' bit.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for generation that I've seen before include "group of similar age" , "peer group" , "production" , "Group born around same time" , "Everyone of same age" .)