Having rejected help, family gets bitter criticism (8)
I believe the answer is:
diatribe
'bitter criticism' is the definition.
'diatribe' can be an answer for 'criticism' (I have seen 'Violent criticism' mean 'diatribe' so perhaps 'criticism' could also mean 'diatribe'). I'm not sure about the 'bitter' bit.
'having rejected help family' is the wordplay.
'having rejected' is a reversal indicator.
'help' becomes 'aid' (synonyms).
'family' becomes 'tribe' (I've seen this in another clue).
'aid' back-to-front is 'dia'.
'dia'+'tribe'='DIATRIBE'
'gets' acts as a link.
Can you help me to learn more?
(Other definitions for diatribe that I've seen before include "A prolonged tirade or abusive speech" , "Long speech" , "Vehement criticism" , "Strong words" , "slating" .)