Different fruit, one box collected (9)
I believe the answer is:
disparate
'different' is the definition.
(similar in meaning)
'fruit one box collected' is the wordplay.
'fruit' becomes 'date' (date is a kind of fruit).
'one' becomes 'i' (Roman numeral).
'box' becomes 'spar' (sparring is a kind of boxing).
'collected' indicates putting letters inside.
'i'+'spar'='ispar'
'date' placed around 'ispar' is 'DISPARATE'.
(Other definitions for disparate that I've seen before include "Contrasting" , "Quite different" , "Including elements very different from one another" .)