Father modified car - it is exploitative (9)
I believe the answer is:
parasitic
'exploitative' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I don't see?
'father modified car it is' is the wordplay.
'father' becomes 'pa' (pa can mean dad or father).
'modified' indicates an anagram.
'it is' becomes 'itis'.
'car'+'itis'='caritis'
'caritis' with letters rearranged gives 'rasitic'.
'pa'+'rasitic'='PARASITIC'
Can you help me to learn more?
(Other definitions for parasitic that I've seen before include "hanging on?" , "Living off another organism" , "Having food provided by host" , "to be paid for by someone else" , "Such threats" .)