Purple jelly flavor (5)
I believe the answer is:
grape
'purple jelly flavor' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for grape that I've seen before include "In Elgin rummage about in the dark" , "Vine berry" , "Small fruit; type of shot" , "It grows on the vine" , "Green/black fruit" .)