Overseas earnings holding facility (4)
I believe the answer is:
ease
'facility' is the definition.
(thesaurus)
'overseas earnings holding' is the wordplay.
'holding' indicates a hidden word.
'EASE' is hidden in the letters of 'overseas earnings'.
(Other definitions for ease that I've seen before include "Comfort and repose" , "Become less severe; facilitate" , "Poise or leisure" , "No trouble" , "Assuage" .)