Become fine again? Explain (5,2)
I believe the answer is:
clear up
I believe this clue is a double definition.
'become fine again?' is the first definition.
(as in bad weather clearing up)
'explain' is the second definition.
(clearing up is a kind of explaining)
(Other definitions for clear up that I've seen before include "Free from confusion - tidy" , "Tidy; explain; cure" , "Solve a mystery - become brighter" , "Resolve" , "put things in order" .)