Even changing the cover round pepped it up (7)
I believe the answer is:
livened
'pepped it up' is the definition.
I can't judge whether this definition defines the answer.
'even changing the cover round' is the wordplay.
'changing' indicates anagramming the letters.
'the cover' becomes 'lid' (lid is a kind of cover).
'round' means one lot of letters goes inside another.
'even' with letters rearranged gives 'vene'.
'vene' put inside 'lid' is 'LIVENED'.
Can you help me to learn more?
(Other definitions for livened that I've seen before include "Animated" , "made brighter" .)