Disorganised nonsense in note (7)

I believe the answer is:

scrappy

I'm a little stuck... Click here to teach me more about this clue!

'disorganised' is the definition.
(I've seen this before)

I don't understand how the rest of the clue works.

(Other definitions for scrappy that I've seen before include "Disjointed" , "disorganised" , "Fragmented" , "Fragmentary" .)

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app