Fruit seen in Jerusalem on shelves (6)
I believe the answer is:
lemons
'fruit' is the definition.
'in jerusalem on shelves' is the wordplay.
'in' says the answer is hidden in the clue.
'LEMONS' is hidden in the letters of 'jerusalem on shelves'.
'seen' is the link.
(Other definitions for lemons that I've seen before include "Could strange melons be citrus?" , "Citrus friuts" , "Strangely melons could be citrus fruits" .)