Reportedly uninteresting fruit (4)
I believe the answer is:
sloe
'fruit' is the definition.
(I've seen this before)
'reportedly uninteresting' is the wordplay.
'reportedly' shows a homophone (sound like).
'uninteresting' becomes 'slow'.
'slow' is a homophone of 'SLOE'.
(Other definitions for sloe that I've seen before include "Sour blue-black fruit" , "Thorny bush with plum-like fruit" , "Fruit of the blackthorn does't sound fast" , "Musical study" , "Black fruit" .)