It's said to be the spice of life (7)
I believe the answer is:
variety
'it's said to be the spice of life' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for variety that I've seen before include "Diversity in old music hall?" , "kind of show" , "Kind (of entertainment?)" , "Type; stage genre" , "Difference" .)