Fruit is mostly loaded with nothing inside ready (7)
I believe the answer is:
apricot
'fruit' is the definition.
(apricot is a kind of fruit)
'mostly loaded with nothing inside ready' is the wordplay.
'mostly loaded' becomes 'ric' (I can't explain this - if you can you should give a lot more credence to this answer).
'with nothing' becomes 'o' (I've seen this in other clues).
'inside' indicates putting letters inside.
'ready' becomes 'apt' (I've seen this before).
'ric'+'o'='rico'
'rico' put into 'apt' is 'APRICOT'.
'is' acts as a link.
(Other definitions for apricot that I've seen before include "shade" , "Asian fruit" , "A fruit-tree" , "Fruit from a tropic" , "Rip coat (anag) - fruit" .)