Pale bum certain to provide amusement (8)
I believe the answer is:
pleasure
'provide amusement' is the definition.
(I know that amusement is a type of delight)
'pale bum certain' is the wordplay.
'bum' is an anagram indicator (bum can mean faulty or wrong).
'certain' becomes 'sure' (synonyms).
'pale' with letters rearranged gives 'plea'.
'plea'+'sure'='PLEASURE'
'to' is the link.
(Other definitions for pleasure that I've seen before include "Delectation, delight" , "Happy satisfaction" , "Feeling of enjoyment or satisfaction" , "A very desirable feeling" , "'Enjoyment, delight (8)'" .)