Describes spiced bananas stuffed with a bit of treacle (7)
I believe the answer is:
depicts
'describes' is the definition.
('depict' can be a synonym of 'describe')
'spiced bananas stuffed with a bit of treacle' is the wordplay.
'bananas' indicates an anagram (informal term for mad).
'stuffed with' indicates putting letters inside (I've seen this in other clues).
'a bit of' indicates taking the first letters.
The first letter of 'treacle' is 't'.
'spiced' with letters rearranged gives 'depics'.
'depics' enclosing 't' is 'DEPICTS'.
(Other definitions for depicts that I've seen before include "outlines" , "Paints or draws something" , "Describes or shows as picture" .)