Pale cur managed to become cured (5,2)
I believe the answer is:
clear up
'become cured' is the definition.
I can't tell whether this definition defines the answer.
'pale cur managed' is the wordplay.
'managed' indicates anagramming the letters.
'pale'+'cur'='palecur'
'palecur' is an anagram of 'CLEAR-UP'.
'to' is the link.
Can you help me to learn more?
(Other definitions for clear up that I've seen before include "Give reasons for" , "Sort out" , "(Of bad weather) improve" , "Get better" , "put things in order" .)