Energy saving scheme (3)
I believe the answer is:
pep
This could be a double definition.
'energy' is the first definition.
(personal energy, vim)
'saving scheme' is the second definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
Can you help me to learn more?
(Other definitions for pep that I've seen before include "Vim and vitality" , "Palindrome for vitality or energy" , "Energy or enthusiasm" , "Ginger; tax-free investment" , "Get-up-and-go" .)