Daily delivery, primarily beet (5)
I believe the answer is:
chard
'beet' is the definition.
(chard is a kind of beet)
'daily delivery primarily' is the wordplay.
'daily' becomes 'char' (I've seen this before).
'primarily' says to take the initial letters.
The first letter of 'delivery' is 'd'.
'char'+'d'='CHARD'
(Other definitions for chard that I've seen before include "Type of beet" , "Leaf stalks from a kind of beet" , "Vegetable; Somerset town" , "Kind of (Swiss?) beet with edible leaves" , "salad" .)