Right to put in bananas I felt for this pudding (6)
I believe the answer is:
trifle
'this pudding' is the definition.
(type of pudding)
'right to put in bananas i felt' is the wordplay.
'right' becomes 'r' (common abbreviation).
'to put in' indicates putting letters inside.
'bananas' indicates anagramming the letters (bananas can informally mean crazy).
'i'+'felt'='ifelt'
'ifelt' is an anagram of 'tifle'.
'r' put inside 'tifle' is 'TRIFLE'.
'for' is the link.
(Other definitions for trifle that I've seen before include "Dessert - something unimportant" , "Dessert - toy" , "that doesn't matter" , "Play - trivia" , "Type of dessert" .)