Appeal guaranteed to give satisfaction (8)
I believe the answer is:
pleasure
'satisfaction' is the definition.
(I know this)
'appeal guaranteed' is the wordplay.
'appeal' becomes 'plea' (plea is a kind of appeal).
'guaranteed' becomes 'sure' (I've seen this in other clues).
'plea'+'sure'='PLEASURE'
'to give' acts as a link.
(Other definitions for pleasure that I've seen before include "Enjoyment, happiness" , "Feeling of enjoyment or satisfaction" , "Delight, joy" , "Happy satisfaction" , "amusement" .)