Fruit knocked over in Bologna market (5)
I believe the answer is:
mango
'fruit' is the definition.
(type of fruit)
'knocked over in bologna market' is the wordplay.
'knocked over' shows that the letters should be reversed in order.
'in' indicates a hidden word.
'ognam' can be found hidden inside 'bologna market'.
'ognam' in reverse letter order is 'MANGO'.
(Other definitions for mango that I've seen before include "Once exotic fruit" , "No, Mag has the odd fruit" , "fruit-tree" , "Fleshy tropical fruit" , "Type of fruit" .)