Nothing charged for Mediterranean fruit (5)
I believe the answer is:
olive
'mediterranean fruit' is the definition.
(I've seen this before)
'nothing charged' is the wordplay.
'nothing' becomes 'o' (looks like zero - 0).
'charged' becomes 'live' (I've seen this in other clues).
'o'+'live'='OLIVE'
'for' acts as a link.
(Other definitions for olive that I've seen before include "Small green Mediterranean tree fruit, nice in martini" , "Small green Mediterranean tree-fruit (5)" , "Mediterranean fruit or greenish colour" , "Cocktail fruit" , "Fruit giving oil" .)