Neat rig made one unappreciative (7)
I believe the answer is:
ingrate
'one unappreciative' is the definition.
(I've seen this before)
'neat rig made' is the wordplay.
'made' indicates anagramming the letters.
'neat'+'rig'='neatrig'
'neatrig' with letters rearranged gives 'INGRATE'.
(Other definitions for ingrate that I've seen before include "No thanks, I say!" , "Tangier (anag)" , "Unappreciative character" , "Thankless wretch" , "Ungrateful person" .)