Small beer in this dessert? (6)
I believe the answer is:
trifle
I believe this is a double definition.
'small beer' is the first definition.
(synonyms)
'this dessert?' is the second definition.
(trifle is a kind of dessert)
'in' is the link.
(Other definitions for trifle that I've seen before include "Dessert - something unimportant" , "Not much" , "Toy; a sweet" , "Insignificant thing" , "Act foolishly" .)