TV set review's oddly missing animation (5)
I believe the answer is:
verve
'animation' is the definition.
(I know that verve is a type of energy)
'tv set review's oddly missing' is the wordplay.
'oddly missing' means one should take alternating letters (letters in odd-numbered positions removed).
'tv'+'set'+'review'='tvsetreview'
The alternate letters of 'tvsetreview' are 'VERVE'.
(Other definitions for verve that I've seen before include "Vitality" , "Zest and exuberance" , "zip" , "Vigour, spirit, style" , "Sparkling enthusiasm" .)