A crop - it's exotic fruit (7)
I believe the answer is:
apricot
'fruit' is the definition.
(type of fruit)
'a crop it's exotic' is the wordplay.
'exotic' indicates an anagram (an unusual form of the letters).
'crop'+'it'='cropit'
'cropit' with letters rearranged gives 'pricot'.
'a'+'pricot'='APRICOT'
(Other definitions for apricot that I've seen before include "Fruit from a tropic" , "Yellow fruit" , "Stoned fruit" , "Orange-yellow fruit in plum family" , "Juicy fruit" .)