Most of rite mother used to somehow endure to the end (4,3,3,5)
I believe the answer is:
ride out the storm
'endure to the end' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'most of rite mother used to somehow' is the wordplay.
'most of' means to remove the last letter.
'somehow' indicates an anagram.
'rite' with its final letter removed is 'rit'.
'rit'+'mother'+'used'+'to'='ritmotherusedto'
'ritmotherusedto' is an anagram of 'RIDE OUT THE STORM'.
Can you help me to learn more?
(Other definitions for ride out the storm that I've seen before include "keep going against the odds" , "Survive danger" .)