Complaint from oddly mean, entitled person (6)
I believe the answer is:
malady
'complaint' is the definition.
(malady is a kind of health problem)
'oddly mean entitled person' is the wordplay.
'oddly' means one should take alternating letters (letters in odd-numbered positions).
'entitled person' becomes 'lady' (lady is a kind of person. I am not sure about the 'entitled' bit.).
The alternate letters of 'mean' are 'ma'.
'ma'+'lady'='MALADY'
'from' is the link.
Can you help me to learn more?
(Other definitions for malady that I've seen before include "Disease or disorder" , "Afflication" , "Sickness, ailment" , "Ailment; illness" , "affection" .)