Small program to craft dessert (5,4)
I believe the answer is:
apple tart
'dessert' is the definition.
(I've seen this before)
'small program to craft' is the wordplay.
'small program' becomes 'applet' (I've seen this in another clue).
'to craft' becomes 'art' (both can mean cunning or trickery).
'applet'+'art'='APPLE-TART'
(Other definitions for apple tart that I've seen before include "Pastry" , "Sweet" , "Dessert" .)