Occasional bits of jelly in the cream (5)
I believe the answer is:
elite
'cream' is the definition.
(as in the cream of the crop)
'occasional bits of jelly in the' is the wordplay.
'occasional bits of' indicates alternate letters (letters selected at regular intervals).
'jelly'+'in'+'the'='jellyinthe'
The alternate letters of 'jellyinthe' are 'ELITE'.
(Other definitions for elite that I've seen before include "Letter size; superior group" , "Aristocratic" , "Top group f" , "Group considered to have superior status" , "Cream, the pick" .)