Cake I clear off (6)
I believe the answer is:
eclair
'cake' is the definition.
(eclair is a type of cake)
'i clear off' is the wordplay.
'off' indicates an anagram.
'i'+'clear'='iclear'
'iclear' with letters rearranged gives 'ECLAIR'.
(Other definitions for eclair that I've seen before include "A long choux cake" , "Comedienne" , "comedian Jenny?" , "Chocolate-topped, cream-filled cake" , "Finger-shaped, chocolate-iced, cream-filled cake" .)