Select rice, finally -- low in calories (5)
I believe the answer is:
elite
'select' is the definition.
(thesaurus)
'rice finally low in calories' is the wordplay.
'finally' suggests the final letters.
'low in calories' becomes 'lite' (I've seen this before).
The final letter of 'rice' is 'e'.
'e'+'lite'='ELITE'
(Other definitions for elite that I've seen before include "A privileged or superior social group" , "Superior group in society" , "Chosen ones" , "Pick of the bunch" , "Aristocratic" .)