Such a person may have too much on his plate (6)
I believe the answer is:
greedy
'such' is the definition.
Both the definition and answer are adjectives. Perhaps you can see an association between them that I don't see?
'a person may have too much on his plate' is the wordplay.
I cannot quite understand how this works, but
'on' could be 're' (regarding) and 're' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for greedy that I've seen before include "Gluttonous" , "Having a voracious appetite" , "Avaricious and acquisitive" , "Overeating" , "Wanting too much" .)