Enduring some rabid ingrates (7)
I believe the answer is:
abiding
'enduring' is the definition.
('abide' can be a synonym of 'endure')
'some rabid ingrates' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'ABIDING' is hidden within 'rabid ingrates'.
(Other definitions for abiding that I've seen before include "Unceasing or putting up with" , "Durable, lasting" , "(Of memory) enduring" , "Dwelling; enduring, lasting" , "Tolerating" .)