Relief obtained from overseas earnings (4)
I believe the answer is:
ease
'relief' is the definition.
(I know that relief can be written as ease)
'obtained from overseas earnings' is the wordplay.
'obtained from' indicates the answer is hidden within the clue.
'EASE' is hidden in the letters of 'overseas earnings'.
(Other definitions for ease that I've seen before include "Calm" , "Make less severe, comfort" , "Become less severe; facilitate" , "Comfort or freedom from difficulty" , "Relief" .)